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 Power Meter FC/SC/ST universal interface Fiber Tester Built-in 1Mw Visual Fault Locator (OPM&VFL)

Fiber Optic Cable Tester Portable Optical Power Meter FC/SC/ST universal interface Fiber Tester Built-in 1Mw Visual Fault Locator (OPM&VFL)

Product ID: 225257474

Details

Brand
D YEDEMC
Colour
Red
Item weight
140 Grams
Power source
Battery
Style
OPM&VFL

📶8 wavelength measurements (850-1650nm)

🔋Long battery life with 2 AAA batteries

🔌Universal FC/SC/ST & RJ45 interface support

324.79 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your fiber testing game—accuracy and versatility in your pocket!

USER CENTRIC DESIGN - Lightweight (140g), easy to carry, with wavelength memory and user calibration for personalized precision.
SMART POWER MANAGEMENT - Automatic shutdown and backlight options extend battery life, keeping you powered through long workdays.
UNIVERSAL COMPATIBILITY - Supports FC, SC, ST connectors plus RJ45 testing—future-proof your toolkit for any fiber or network job.
PRECISION ACROSS 8 WAVELENGTHS - Measure from 850nm to 1650nm with industry-grade accuracy for all your fiber optic needs.
DUAL FUNCTIONALITY IN ONE DEVICE - Combine Optical Power Meter and Visual Fault Locator to replace two tools with one sleek, portable tester.

The D YEDEMC Portable Fiber Optic Cable Tester is a compact, battery-powered device combining an Optical Power Meter and Visual Fault Locator. It measures 8 standard wavelengths from 850nm to 1650nm with a test range of -70dBm to +6dBm, supports universal FC/SC/ST connectors and RJ45 testing, and features smart power management including automatic shutdown and backlight. Lightweight and user-friendly, it’s designed for professionals demanding precision and portability.

Specifications

ASIN	B07XKH68B3
Best Sellers Rank	722,073 in DIY & Tools ( See Top 100 in DIY & Tools ) 585 in Network Testers
Brand	D YEDEMC
Colour	Red
Customer Reviews	4.6 out of 5 stars 1,101 Reviews
Item Weight	140 Grams
Item weight	140 Grams
Manufacturer	Yide Machinery Co. Ltd.
Manufacturer Part Number	OPM
Measurement Type	Optical Power Meter
Model Number	OPM-VFL-1
Number of Items	1
Power Source	Battery Powered
Power source	Battery Powered
Specification Met	IEC 61010-2-030, CE Marked, NIST Traceable
Specification met	IEC 61010-2-030, CE Marked, NIST Traceable
Style	OPM&VFL
Style Name	OPM&VFL
UPC	782855705384
Upper Temperature Rating	60 Degrees Celsius

Reviews

M**V

Good tool

The battery life is good, the original batteries are still working. It's easy to use and reasonably priced.

3.05.2026

M**O

Slight Expensive but Accuracy high

Very good Optical power meter. It's range -70dBm to +6dBm. It's measured value is very good. No doubt must buy. And it's operate on 2 AAA batteries and which is provided in the box. You can also check RJ45 connection properly. Which's measuring kit also give in the box. I shared some product pic that you have an idea before buy.

29.05.2026

I**N

Durable and Accurate

Purchased this 2022, I use it everyday for my job, and up to till now 2025 still works great! Amazing!

2.08.2025

H**R

Encantado

Muy práctico el producto, no ocupa espacio 2 en 1

5.06.2024

G**Z

Good for work

Good tool for my work

19.07.2026

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324.79 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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3 weeks ago

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