1,10 Wavelength: This fiber optic power meter has 10 wavelength, 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm and with SC FC ST adapter for use. 2,Auto Power Off Function: VFL optic power net cable tester has 10 mins automatic power off function and fast and accurate. 3,Relative Power Calculation: No need to wait for warm up, optic power net cable tester can do plug and play with accurate measurement, relative power calculation, calibration function. 4,Low Battery Consumption: VFL net cable tester adopts sensitive chip and rugged internal structure. Low battery consumption and longer working time. 5,Requirements Covering: Fiber optic power meter VFL covering most of the requirements of communication engineering maintenance. Item Type: Fiber Optic Power Meter Material: ABS Red Light VFL Detection Distance: 30km Power Supply: AAA Batteries Required x 2 (Shipped Without Batteries) Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelength: 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm Display Resolution Linearity Display: 0.1 percent Logarithmic Display: 0.01dBm Operating Temperature: -10 - and60℃ Storage Temperature: -25 - and70℃ Auto Shutdown Time: 10 Minutes Battery Duration: Not Less Than 40 Hours 1 x Optical Power Meter 1 x Lanyard 1 x Instruction Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.