---
product_id: 462850269
title: "4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino"
brand: "haljia"
price: "VT7156"
currency: VUV
in_stock: true
reviews_count: 5
category: "Haljia"
url: https://www.desertcart.vu/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module
store_origin: VU
region: Vanuatu
---

# Plug & play, no wiring hassle 12-key 4x3 matrix layout Universal MCU compatibility 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino

**Brand:** haljia
**Price:** VT7156
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your DIY game with instant keypad control!

## Quick Answers

- **What is this?** 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino by haljia
- **How much does it cost?** VT7156 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/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module)

## Best For

- haljia enthusiasts

## Why This Product

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

## Key Features

- • **Durable Build Quality:** Premium plastic and metal materials ensure long-lasting reliability in any setup.
- • **Effortless Plug & Play:** Skip the soldering—direct connection means instant project upgrades.
- • **Compact 4x3 Matrix Design:** Seamlessly integrates 12 keys (0-9, *, #) for intuitive numeric input.
- • **Space-Smart & Mount-Ready:** Slim 69.5×51×10 mm footprint with four mounting holes for sleek, secure installation.
- • **Broad Microcontroller Compatibility:** Works flawlessly with Arduino, AVR, PIC, and more for versatile prototyping.

## Overview

The 4x3 Matrix Array 12 Switch Keypad Module offers a durable, compact numeric keypad with 12 membrane keys including digits and symbols. Designed for easy plug-and-play integration, it supports a wide range of microcontrollers like Arduino, AVR, and PIC, making it ideal for electronic projects, access control, and device management. Its robust plastic and metal construction combined with a small footprint and mounting options ensures reliable, space-efficient performance.

## Description

Features: 12 Key（4x3）matrix keyboard module. Keyboard matrix allows you to quickly add controls to your electronic project. It provides 0 to 9 numbers, as well as standard stars (*) and hash (#) symbol. Easy to communicate with any microcontroller. Easy to install thanks to four mounting holes on each corner. Size: 69.5 × 51× 10 mm Weight：17.5g Packing List: 1 x 4x3 12 Switch Keyboard Module

Review: Anche se manca lo schema elettrico trovato in internet, funziona bene.
Review: Don't buy this crap, rows and columns is not connected as they should.

## Features

- The 4x3 -12 Switch matrix keyboard module is made by high quality plastic and metal material which is very durable and reliable.
- It provides 0 to 9 numbers, as well as standard stars (*) and hash(#) symbols.
- Keyboard matrix allows you to quickly add controls to your electronic project. Direct replacement, a simple plug and play with no wire splicing.
- Easy to communicate with any microcontroller. This module is compatibile with microcontrollers such as AVR and PIC which makes it a perfect choice for your Arduino applications and projects.
- Its small size and compact design make this switch more convenient in module alarm/safety device operation, access control, and device control.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08BBXH6NM |
| Additional Features | arch support |
| Antenna Location | Alarm system control, Access control, Device control |
| Best Sellers Rank | #145,923 in Computers ( See Top 100 in Computers ) #4,419 in Computer Keyboards |
| Brand | HALJIA |
| Built-In Media | USB Cable |
| Button Quantity | 12 |
| Color | ice |
| Compatible Devices | Laptop |
| Compatible Operating System Family | Windows |
| Connectivity Technology | RF, Wired |
| Customer Reviews | 3.2 3.2 out of 5 stars (41) |
| Enclosure Material | Metal, Plastic |
| Hand Orientation | Ambidextrous |
| Item Dimensions L x W x H | 7L x 5.1W centimeters |
| Keyboard Description | Membrane |
| Keyboard Layout | QZERTY |
| Manufacturer | HALJIA |
| Mfr Part Number | ADN2006037 |
| Number of Keys | 12 |
| Number of Sections | 1 |
| Power Source | USB power |
| Style Name | Modern |
| Switch Type | Membrane |
| Theme | Number |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** HALJIA
- **Compatible devices:** Laptop
- **Connectivity technology:** RF, Wired
- **Keyboard description:** Membrane
- **Recommended uses for product:** Alarm system control, Access control, Device control

## Images

![4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - Image 1](https://m.media-amazon.com/images/I/71svmWwBV2L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by M***O on 7 December 2024*

Anche se manca lo schema elettrico trovato in internet, funziona bene.

### ⭐ Review
*by G***L on 18 March 2024*

Don't buy this crap, rows and columns is not connected as they should.

### ⭐⭐⭐⭐⭐ Review
*by J***H on 9 December 2021*

well made nothing to dislike

## Frequently Bought Together

- HALJIA 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino
- AZDelivery LOLIN32 Lite V1.0 ESP-32 Rev1 WiFi Bluetooth Board 4MB Flash 500mA CH340 CH340G Lithium Battery Connector ESP32 compatible with Arduino Including E-Book!

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vu/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module](https://www.desertcart.vu/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module)

---

*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-06-18*