D YEDEMC Optical Power Meter FC/SC/ST universal interface, 8 standdard wavelengths 850/980/1300/1310/1490/1550/1625/1650nm, test range -70dBm~+6dBm,RJ45 test

Works great as a light meter, nice and responsive, turns on quickly, and remembers the last used wavelength. The VFL is decently bright, great for locating fiber in an MDU or quickly testing a drop, not so great for finding small breaks in invisilight or tracing a damaged feed from a off-site distribution.The "RJ45" test feature is completely absent however, there is no jack on the bottom, just an empty spot behind the cover, and there are no LEDS on the face above the buttons like in the pictures. Instead of saying "Optical power Meter" it has a logo for Youysi.Not a huge deal breaker as I have other test sets for RJ45/Cat5e/etc, and it's decent for what it actually does, but only 3 stars for 1/3 of the functions completely missing.If you want a very nice compact power meter, with a serviceable VFL, its a great buy.

Muy práctico el producto, no ocupa espacio 2 en 1

I work at a fiber optic internet company, it’s been very useful and it has all my needs on the field.We get optimeters for testing light, they take forever to turn on and there is no VFL on our models. It’s so convenient having instant access to check light levels that you can store in your pocket all the time. The VFL is handy and bright, only downside is after 5-10 minutes it automatically turns off. I wish if the VFL is on then it won’t turn off but it’s not a big deal.I highly recommend calibrating to your fiber optic wavelength and light levels, the out of box experience is good with about 3 DB off but it’s great for a general estimate when it’s not very important. After calibration even after a couple months it’s been accurate and works very well.The battery life is pretty good, it uses 2 AAA batteries and it lasts me about a month or bit more.I love the Ethernet tester that is built onto the removable slot on the bottom. On the field I also work with CAT 6 and it’s great having it on the tool, I never have to carry around a separate Ethernet tester or ever run to my truck to find it. It’s helped me out in situations I never expected.The only major downside I had is the screen. When I first bought it, after about a month half of the screen was not working and was affecting my readings. I exchanged it for a new one and been very careful with the screen and making sure it won’t get dropped or damaged. It’s been a couple months and it’s been working just as it’s new.Overall, I love this tool and it will be a must need for me when I’m on the field.

I’m a wire technician, working with fiber optic cables every day. The laser is brighter than other lasers i’ve used, making finding faults and finding my fiber in a bundle easy. The light reader is accurate, within .5dbm of my work issued light meter. Having both a laser and light meter in one compact device is great.Helpful tip, the unit is set to turn off after 10 minutes. once powered on, press the power button once to turn off this auto off feature. This device absolutely devours AAA batteries, so make sure to turn it off.

Excelente