Features 7 Wavelength: With 7 wavelengths for use, namely 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, can meet your most needs. HIGH EFFICIENCY The meter has a wide measuring range from -70 to +10dBm, the measurement is fast and accurate, no need to wait for warm-up. Excellent performance: adopt a sensitive chip and robust internal structure, the output distance is up to 10 km, has a relative power calculation and calibration function. Easy Operation The meter is plug and play, with display screen, LED light and SC FC ST adapter, which is very convenient for operation Long Battery Life The battery consumption is low, which ensures long battery life and can work continuously for 40 hours. Specification: Item Type:Fiber Optic Power Meter Material: ABS Optical output power: >10MW Output distance: 10 km. Power supply: 2 x AA batteries (battery not included). Power measurement range: -70 to +10 dBm. Probe range: InGaAs Wavelength Range: 850-1625nm Standard wavelength (nm): 850, 980, 1300, 1310, 1490, 1550, 1625 Display resolution: linear display 0.1%, logarithmic display 0.01dBm Working temperature (℃): -10°C to +60°C. Storage temperature (℃): -25°C to +70°C. Automatic switch-off time (min. ): 10 minutes. Continuous battery life: no less than 40 hours Package list: 1 x fibre optic power meter. 1 x FC adapter. 1 x user manual (English language Package List 1 x Fiber Optical Power Meter 1 x FC Adapter 1 x Manual