---
product_id: 626559913
title: "Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike"
brand: "coros"
price: "VT31178"
currency: VUV
in_stock: true
reviews_count: 13
category: "Coros"
url: https://www.desertcart.vu/products/626559913-heart-rate-monitor-comfort-easy-to-wear-auto-wear-detection
store_origin: VU
region: Vanuatu
---

# Soft, breathable fabric band Connects 3 devices simultaneously 38h battery life Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike

**Brand:** coros
**Price:** VT31178
**Availability:** ✅ In Stock

## Summary

> 🎯 Elevate your workout game with precision and comfort—because your heart deserves the best.

## Quick Answers

- **What is this?** Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike by coros
- **How much does it cost?** VT31178 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/626559913-heart-rate-monitor-comfort-easy-to-wear-auto-wear-detection)

## Best For

- coros enthusiasts

## Why This Product

- Trusted coros brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unmatched Endurance:** 38 hours of continuous heart rate tracking—power through your longest workouts without a recharge.
- • **Comfort-First Design:** Soft, breathable nylon band that beats chest straps—wear it all day with zero chafing or discomfort.
- • **Precision You Can Trust:** Advanced sensor technology delivers real-time, accurate heart rate data to optimize every run and ride.
- • **Smart Auto-Wear Detection:** Automatically powers on/off when worn—no buttons, no hassle, just pure focus on your performance.
- • **Seamless Multi-Device Sync:** Pair effortlessly with up to 3 Bluetooth devices at once—stay connected across your watch, phone, and bike computer.

## Overview

The COROS Heart Rate Monitor armband combines advanced sensor accuracy with a soft, breathable fabric band for superior comfort during sports. Featuring 38 hours of battery life, Bluetooth connectivity to up to three devices simultaneously, and smart auto-wear detection, it’s engineered for serious runners and cyclists who demand reliable, distraction-free heart rate data.

## Description

Product description Will the COROS Heart Rate Monitor support ANT+? No, There will be no ANT+ support as we are using a newer Bluetooth chip which does not provide ANT+ support but has far better computing power and lower power consumption than chips with ANT+ support. Will the COROS Heart Rate Monitor support ANT+? No, There will be no ANT+ support as we are using a newer Bluetooth chip which does not provide ANT+ support but has far better computing power and lower power consumption than chips with ANT+ support. Can I pair the COROS HR Monitor with My Phone? To record a workout with the COROS Heart Rate Monitor directly from your phone, we recommend using a free activity tracking app like Strava, MyFitnessPal, RunTracker, or others available on the iOS and Google Play stores. Can I pair the COROS HR Monitor with My Phone? To record a workout with the COROS Heart Rate Monitor directly from your phone, we recommend using a free activity tracking app like Strava, MyFitnessPal, RunTracker, or others available on the iOS and Google Play stores. Can I pair the COROS HR Monitor with My Phone? *The COROS app currently does not support recording activities on the app itself. The COROS HR Monitor can also pair with any fitness tracking watch, gym equipment, cycling computers, and more.** *The COROS app currently does not support recording activities on the app itself. The COROS HR Monitor can also pair with any fitness tracking watch, gym equipment, cycling computers, and more.** Does the COROS Heart Rate Monitor work over tattoos? Depending on the density of the tattoo, the heart rate monitor may be able to get a reading but it's not guaranteed. If you have tattoos, we recommend adjusting the placement (bicep, forearm, opposite arm). Does the COROS Heart Rate Monitor work over tattoos? Depending on the density of the tattoo, the heart rate monitor may be able to get a reading but it's not guaranteed. If you have tattoos, we recommend adjusting the placement (bicep, forearm, opposite arm). How do I charge the COROS Heart Rate Monitor? Connect the charging cable to the backside of the heart rate monitor. An orange light will appear while the monitor is charging. The light will turn green once it's fully charged. How do I charge the COROS Heart Rate Monitor? Connect the charging cable to the backside of the heart rate monitor. An orange light will appear while the monitor is charging. The light will turn green once it's fully charged. COROS Heart Rate Monitor COROS Products Comparison Table COROS Heart Rate Monitot COROS PACE 4 COROS NOMAD COROS DURA Bike Computer COROS PACE Pro GPS WATCH COROS APEX 2 Pro Outdoor COROS VERTIX 2S

Review: Excellent Heart Rate monitor! - Outstanding rechargeable Heart Rate Monitor. Paired easily with my Coros Dura, and is very accurate. Arm strap is easily adjustable and comfortable, and it works as a designed. I wish it had a power switch, but I’ll easily trade that for the ability to recharge!
Review: Super accurate, super comfy, very versatile! - I was a part of a voluntary COROS HRM device testing program for two months ahead of the public release for this device, and was so impressed with the metrics it provided that I felt it valuable enough to buy as a gift for a fellow athlete. This quick review reflects my experience with the device during testing (and afterwards), and is not sponsored by COROS. About me: I’ve been an avid runner since 2012, trending towards longer endurance-based events. I’ve run a number of ultramarathons and a handful of 100 mile races. I also do a bit of road and indoor (stationary trainer) cycling as cross-training. Things I like: This HRM appeals to me because of its simplicity and versatility. I like that there are no buttons (it senses when it is being worn), and I like the fact that once you set the sizing, it stays put and is easy to slip on before an activity. For sizing: I’m 5’-9”, 160-ish, and I still have plenty of slack in the strap…but I don’t do a lot of lifting. It is SO much simpler and WAY less noticeable than a chest strap. I also love the magnetic charger–even though it is relatively short (and proprietary). Charging is quick, and the battery life is ample, so it won’t be charging for very long anyhow. Data accuracy: During testing I compared this new HRM to my Wahoo TICKR HRM, as well as data from wrist-based optical HR sensors (COROS Pace 3 and Apex 2 Pro watches). The short summary is that the most consistent data came from this COROS armband. The KICKR chest strap–while plenty accurate–was slower getting an initial reading before beginning an activity, and had some data drop-outs during the activity as well. Chest straps occasionally require adjusting during activities as they loosen and slip. Wrist-based HRM sensors work fairly well, but are somewhat activity dependent. Cycling (especially if venturing off-road) can jostle these sensors from wrist contact and can result in some inconsistent data too. The armband stays securely in place, and is so comfortable and light I often don't notice I'm wearing it. During testing there were data anomalies from all devices, but the armband HRM produced FAR FEWER than any of the others. Material thoughts: The armband material has held up well so far, but DOES tend to get stinky and discolored with wear. I’ve had mine since early July, and wash it with soap and water occasionally when I can’t stand the funk, and it cleans up nicely (see photos). Replacement armbands are also available, though I can't see needing one for a good while. Something I wrote to the product testing group during evaluation: “The more I run with both an arm and chest strap the more I LOVE the arm band. I’ve now got a rash from the chest strap and it drops signal more than any of the three HR options. I’ll admit that I’m a sucker for simplicity, so would normally just use readout from the watch (decent)…but if I need an accurate and responsive HR readout, I’m picking the HR31.” Summary: This armband doesn’t miss a beat (ha!) and makes a lot of sense for an athlete interested in reliable HRM data across multiple sports. I initially wasn’t too keen on adding another device to my quiver, but this HRM earned its place, and would be a worthy asset to those who value consistent accurate data across disciplines.

## Features

- COROS Heart Rate Monitor armband is designed for measuring heart rate during sports and activities. It is not intended to aid in collecting heart rate data for daily tracking purposes.
- COROS Heart rate monitor with large band - Arm size (Large): 9.4 to 16.9 inches (24 to 43 cm)
- COMFORTABLE and QUICK CLEANING: The fabric band is soft and breathable, more comfortable to wear than a chest strap. You can quickly clean the band by removing the sensor of COROS Heart Rate Monitor."COROS Heart Rate Monitor armband is designed for measuring heart rate during sports and activities. It is not intended to aid in collecting heart rate data for daily tracking purposes.
- EASY TO WEAR and FLEXIBLE FIT: COROS Heart Rate Monitor's band lays flat around your arm and locks in place with its textured surface. Set the perfect placement and tension on the elasticated band by sliding the buckle.
- ADVANCED SENSOR and PRECISE DATA: Housed in a tough yet sleek body and protected under a scratch-resistant cover, COROS Heart Rate Monitor's advanced sensor will deliver reliable and accurate heart rate data monitoring to track your workouts in distraction-free comfort.
- LASTING BATTERY LIFE: 38 hours of full operation or 80 days of standby on a single charge. View the battery level on your COROS watch or app and use the magnetic cable to quickly recharge in 2 hours.
- WEAR DETECTION: With built-in wear detection, COROS Heart Rate monitor armband automatically powers on and off based on when it is worn. Automatically connect to your paired devices every time you start a workout.
- MULTIPLE CONNECTIONS: The COROS heart rate monitor chest strap is designed to work seamlessly with your COROS watches and apps, it can also simultaneously pair with up to three devices, including Sports Watches, Indoor Trainers, Bike, Computers, Phones, Apps, Treadmills, and Indoor Rowers. Connects via Bluetooth only, not compatible with ANT+.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CZRGXJS1 |
| Battery Average Life | 38 Hours |
| Battery Description | Rechargeable Lithium-Ion/Polymer (Non-Replaceable) |
| Best Sellers Rank | #1,969 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #5 in Heart Rate Monitors (Sports & Outdoors) |
| Brand | COROS |
| Brand Name | COROS |
| Color | Gray |
| Compatible Devices | Smartphones |
| Customer Reviews | 4.3 out of 5 stars 2,050 Reviews |
| Display Size | 10 |
| Item Weight | 50 Grams |
| Manufacturer | COROS |
| Manufacturer Part Number | COROS Heart Rate Monitor |
| Material | Nylon |
| Material Type | Nylon |
| Model Number | COROS Heart Rate Monitor |
| Screen Size | 10 |
| Sensor Type | Wearable |
| Size | Large |
| Team Name | Choirs |
| UPC | 810005783293 |
| Unit Count | 1.0 Count |
| Warranty Description | 2 year |

## Product Details

- **Battery Description:** Rechargeable Lithium-Ion/Polymer (Non-Replaceable)
- **Battery Life:** 38 Hours
- **Brand:** COROS
- **Color:** Gray
- **Compatible Devices:** Smartphones
- **Item Weight:** 50 Grams
- **Material:** Nylon
- **Screen Size:** 10
- **Sensor Type:** Wearable
- **UPC:** 810005783293

## Images

![Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike - Image 1](https://m.media-amazon.com/images/I/71Ivar5r-AL.jpg)
![Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike - Image 2](https://m.media-amazon.com/images/I/61yVJqxEFYL.jpg)
![Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike - Image 3](https://m.media-amazon.com/images/I/716ngg8Eb8L.jpg)
![Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike - Image 4](https://m.media-amazon.com/images/I/61Qo+cXBRWL.jpg)
![Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike - Image 5](https://m.media-amazon.com/images/I/71DIqt0kk8L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: Will the COROS Heart Rate Monitor support ANT+?**
A: No, There will be no ANT+ support as we are using a newer Bluetooth chip which does not provide ANT+ support but has far better computing power and lower power consumption than chips with ANT+ support.

**Q: Can I pair the COROS HR Monitor with My Phone?**
A: To record a workout with the COROS Heart Rate Monitor directly from your phone, we recommend using a free activity tracking app like Strava, MyFitnessPal, RunTracker, or others available on the iOS and Google Play stores.

**Q: Can I pair the COROS HR Monitor with My Phone?**
A: *The COROS app currently does not support recording activities on the app itself. The COROS HR Monitor can also pair with any fitness tracking watch, gym equipment, cycling computers, and more.**

**Q: Does the COROS Heart Rate Monitor work over tattoos?**
A: Depending on the density of the tattoo, the heart rate monitor may be able to get a reading but it's not guaranteed. If you have tattoos, we recommend adjusting the placement (bicep, forearm, opposite arm).

**Q: How do I charge the COROS Heart Rate Monitor?**
A: Connect the charging cable to the backside of the heart rate monitor. An orange light will appear while the monitor is charging. The light will turn green once it's fully charged.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Heart Rate monitor!
*by V***T on March 30, 2026*

Outstanding rechargeable Heart Rate Monitor. Paired easily with my Coros Dura, and is very accurate. Arm strap is easily adjustable and comfortable, and it works as a designed. I wish it had a power switch, but I’ll easily trade that for the ability to recharge!

### ⭐⭐⭐⭐⭐ Super accurate, super comfy, very versatile!
*by K***R on November 15, 2023*

I was a part of a voluntary COROS HRM device testing program for two months ahead of the public release for this device, and was so impressed with the metrics it provided that I felt it valuable enough to buy as a gift for a fellow athlete. This quick review reflects my experience with the device during testing (and afterwards), and is not sponsored by COROS. About me: I’ve been an avid runner since 2012, trending towards longer endurance-based events. I’ve run a number of ultramarathons and a handful of 100 mile races. I also do a bit of road and indoor (stationary trainer) cycling as cross-training. Things I like: This HRM appeals to me because of its simplicity and versatility. I like that there are no buttons (it senses when it is being worn), and I like the fact that once you set the sizing, it stays put and is easy to slip on before an activity. For sizing: I’m 5’-9”, 160-ish, and I still have plenty of slack in the strap…but I don’t do a lot of lifting. It is SO much simpler and WAY less noticeable than a chest strap. I also love the magnetic charger–even though it is relatively short (and proprietary). Charging is quick, and the battery life is ample, so it won’t be charging for very long anyhow. Data accuracy: During testing I compared this new HRM to my Wahoo TICKR HRM, as well as data from wrist-based optical HR sensors (COROS Pace 3 and Apex 2 Pro watches). The short summary is that the most consistent data came from this COROS armband. The KICKR chest strap–while plenty accurate–was slower getting an initial reading before beginning an activity, and had some data drop-outs during the activity as well. Chest straps occasionally require adjusting during activities as they loosen and slip. Wrist-based HRM sensors work fairly well, but are somewhat activity dependent. Cycling (especially if venturing off-road) can jostle these sensors from wrist contact and can result in some inconsistent data too. The armband stays securely in place, and is so comfortable and light I often don't notice I'm wearing it. During testing there were data anomalies from all devices, but the armband HRM produced FAR FEWER than any of the others. Material thoughts: The armband material has held up well so far, but DOES tend to get stinky and discolored with wear. I’ve had mine since early July, and wash it with soap and water occasionally when I can’t stand the funk, and it cleans up nicely (see photos). Replacement armbands are also available, though I can't see needing one for a good while. Something I wrote to the product testing group during evaluation: “The more I run with both an arm and chest strap the more I LOVE the arm band. I’ve now got a rash from the chest strap and it drops signal more than any of the three HR options. I’ll admit that I’m a sucker for simplicity, so would normally just use readout from the watch (decent)…but if I need an accurate and responsive HR readout, I’m picking the HR31.” Summary: This armband doesn’t miss a beat (ha!) and makes a lot of sense for an athlete interested in reliable HRM data across multiple sports. I initially wasn’t too keen on adding another device to my quiver, but this HRM earned its place, and would be a worthy asset to those who value consistent accurate data across disciplines.

### ⭐⭐⭐⭐⭐ Accurate, comfortable, good value
*by K***B on February 13, 2026*

I bought this to replace a Polar H10 chest strap that was starting to fail after a few years. I use it for cycling and have only used it twice so far but it has been flawless with no spikes or dropouts. It seems accurate and agrees with my Apple Watch which I know agrees with my chest strap. It is more comfortable to wear than the chest strap and also don’t have to keep replacing the CR2032 batteries. I was a little skeptical because I had a few arm bands in the past that were terrible but this one is solid. I bought this instead of the polar Verity because it was less expensive and I did not need all the bells and whistles. It works perfectly with my Garmin Edge cycling computer.

## Frequently Bought Together

- COROS Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike
- COROS PACE 3 Sport Watch GPS, Lightweight and Comfort, 17 Days Battery Life, Dual-Frequency GPS, Heart Rate, Navigation, Sleep Track, Training Plan, Run, Bike, and Ski (Black Silicone)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-11*