what is the max distance this unit will test?

I am assuming you are talking about the laser. From my experience, it is only short distance such as a fiber enclosure. Or pig tail inside the node.

Is it supposed to come with an adapter for sc and st? mine came with no adapters. how to connect st to the meter?

I did not receive one either. I can not find one made for it. But it was pretty accurate compared to my old light meter with blue and green.

Is there a digital version of the user guide? My unit didn't come with instructions.

Not sure. The great part is it only does basically 3 things. play with the buttons for a couple minutes you know more than the manual. 1) cable fault locator (red laser/on off). 2) function key sets db reading (check light level). toggle to RG45 you can check for faults on ethernet. That’s it, good luck

What about lc interface ? i work with lc connections most

Lc is can't.It suit for SC/FC/ST.

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Fiber Optic Cable Tester Portable Optical Fiber Power Meter FC/SC/ST Universal Interface Integrated OPM, VFL, and RJ45 Functions (OPM-VFL-1)

Fiber Optic Cable Tester Portable Optical Fiber Power Meter FC/SC/ST Universal Interface Integrated OPM, VFL, and RJ45 Functions (OPM-VFL-1)

Product ID: 156169245

Details

Brand
D YEDEMC
Color
Yellow
Item Weight
140 Grams
Power Source
Battery
Style
OPM&VFL

📶8 wavelengths tested (850-1650nm)

🔋Battery powered, long-lasting (2x AA)

🔌Universal FC/SC/ST + RJ45 interfaces

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VT11856

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Details

Brand
D YEDEMC
Color
Yellow
Item Weight
140 Grams

Description

⚡ Elevate your fiber game with the ultimate all-in-one tester—never miss a signal!

POCKET SIZED POWERHOUSE - Lightweight (4.9 oz) and portable with backlight and auto-shutdown for field-ready convenience.
UNIVERSAL COMPATIBILITY - Works seamlessly with FC, SC, ST connectors plus Ethernet RJ45 testing—one tool, endless possibilities.
MULTI WAVELENGTH MASTERY - Supports 8 standard wavelengths for versatile fiber optic diagnostics across all your projects.
SMART MEMORY CALIBRATION - Wavelength memory and user calibration ensure accuracy that keeps pace with your professional demands.
ALL IN ONE PRECISION TESTER - Integrated OPM, VFL, and RJ45 functions streamline your workflow—ditch multiple devices.

The D YEDEMC OPM-VFL-1 is a compact, battery-powered fiber optic cable tester combining Optical Power Meter, Visual Fault Locator, and RJ45 Ethernet testing in one device. It supports 8 wavelengths (850-1650nm), universal FC/SC/ST interfaces, and features backlight, auto shutdown, and user calibration for precise, on-the-go diagnostics favored by field professionals.

Specifications

ASIN	B07XKH68B3
Best Sellers Rank	#8,668 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Network & Cable Testers
Brand	D YEDEMC
Brand Name	D YEDEMC
Color	Yellow
Customer Reviews	4.6 out of 5 stars 1,300 Reviews
Item Weight	140 Grams
Manufacturer	Yide Machinery Co. Ltd.
Measurement Type	Powermeter
Model	OPM-VFL-1
Part Number	OPM
Power Source	Battery Powered
Specification Met	Ul 61010-1, Iec 61010-2-030
Style	OPM&VFL
Style Name	OPM&VFL
UPC	782855705384
Upper Temperature Rating	60 Degrees Celsius

Reviews

J**N

21.01.2024

L**N

6.01.2026

L**Z

28.02.2026

K**R

19.02.2021

T**D

25.01.2026

E**E

27.09.2023

G**N

19.04.2025

K**S

19.12.2025

L**.

24.06.2025

G**A

24.01.2026

I**N

2.08.2025

A**Y

29.01.2026

B**N

2.10.2024

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