WIDE APPLICATION 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 the daily needs, choose with confidence! ABS MATERIAL: Made of premium ABS material, this optical power meter is durable and scratch-resistant, can withstand various situations and ensure a long service life. LOW POWER CONSUMPTION: Optical power meter has low power consumption and can be used for 40 hours for continuous operation. The meter will automatically shut down after 10 minutes of no operation, to save electricity and extend its service life. 3 IN 1: This is not only an optical power meter, but also an optical fiber tester and RJ45 tester, used to meet your different needs. EASY TO CARRY: Comes with a small size and a light weight too, you can easily carry the optical power meter for convenient use. 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