Welcome to the store! 1、Better Testing: The optical fiber power meter has a wide testing range, which is perfectly suitable for SC, FC and ST adapters. 2、Reliable Use: Comes with calibration and relative power calculation function, the digital optical cable is simple to operate. 3、Wavelength: 10 kinds of wavelength, 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650 nm. 4、Simple Working: Thanks to the sensitive chip and the robust internal structure, the optical tester is quick in response. 5、Easy to Carry: Designed to have a compact size and a light weight, very easy to carry for indoor and outdoor use. Item Type: Optical Fiber Power Meter Material: ABS Red Light Source Detection Distance: Approx. 1000m / 3280.84ft Power Supply: 2 x AAA battery, delivered without battery. Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelengths: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650nm. Linear Display Resolution: 0.1% Logarithmic Display Resolution: 0.01dBm Working Temperature Resolution: -10 ~ +60℃ Storage Temperature Resolution: -25 ~ +70 ℃ Automatic Shutdown Time: 10 minutes Battery Powered Continuous Working Time: No less than 40 hours. 1 x Optical Fiber Power Meter 1 x Lanyard 1 x User Manual Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!