Feature: 1. WIDE USE RANGE: 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm with SC,FC, ST adapters. This optical fiber power meter can meet most of daily use, choose with confidence 2. ABS MATERIAL: Made of premium ABS material, this optical power meter is wear resistant and scratch resistant, withstanding different situations and ensuring a long life span. 3. LOW POWER CONSUMPTION: Optical power meter features a low power consumption, and can be used for 40 hours for continuous operation. The meter will automatically shut down after 10 minutes without any action, in order to save electricity and extend its service life. 4. 3 IN 1: This is not only a optical power meter, but also a optical fiber tester and RJ45 tester, use to meet your different needs. 5. EASY CARRYING: Comes with a small size and a light weight as well, you can easily carry the optical power meter for convenient use. Specification: Item Type: Optical Fiber Power Meter Material: ABS Power Supply: Requires AAA battery x 2 (shipped without battery) Power Measurement Range: -70 to +10dBm Probe Range: For InGaAs Wavelength Range: 850 to 1650nm Standard Wavelengths (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: linear Display: 0.1% Logarithmic Display: 0.01dBm Working Temperature (℃): -10~+60 ℃ Storage Temperature (℃): -25~+70 ℃ Automatic Shutdown Time (min): 10 minutes Battery Continuous Working Time: Not less than 40 hours. Package List: 1 x Optical Fiber Power Meter1 x Manual 1 x Lanyard