Features Fast and Accurate: The multifunctional optical power meter has a built-in sensitive chip for accurate measurement results and fast response. 10 wavelengths: This fiber optic power meter can measure wavelengths of 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm, covering most maintenance needs of the communications engineering. Low battery consumption: This multifunctional optical power meter has low battery consumption and can work continuously for 120 hours. Powerful Function: This multifunctional optical power meter has relative power calculation and calibration function with stable performance. ABS Housing: The portable fiber optic power meter uses ABS plastic as the housing, lightweight and wear-resistant, sturdy structure, easy to carry. Specifications: Item type: Fiber optic power meter Material: ABS Wavelength range: 800-1700 nm Optical connector: Universal connector ( SC/FC/ST) Connector type: InGaAs Power measurement range: -70-+10 dBm Measuring accuracy error: Standard wavelength: 850, 980 , 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm Display resolution: linear display 0.1%, logarithmic display 0.1 dBm Identifiable frequency: 270 Hz, 300 Hz, 1 kHz, 2 kHz Power: 2 AAA batteries (excluded) Battery life: Greater than or equal to 120 hours (optical power meter function) Off time automatic voltage: 10 min Color: White How to use: Turn on and use Packing list: 1 x counter fiber optic power 1 x lanyard 1 x instruction Package List 1 x Optical Fiber Power Meter 1 x Lanyard 1 x Instruction