Features Multiple function: with fast and accurate measurement, you do not have to wait for the warm-up, which has a relative power calculation and calibration function. Good performance: sensitive chip and robust internal structure, low power consumption, automatic shut-off in 10 minutes, can work continuously for 40 hours. Working area: optical mini power meter, power measurement range is 70-10dBm, wavelength range 850-1700nm, efficient and durable. ABS shell: handheld fiber performance tester, the shell is made of ABS material, lightweight, wear and aging resistant, and has a long service life. Compact size: the fibre optic power meter has a compact size and covers most maintenance requirements of communications technology. Specification: Item Type:Optical Power Meter Model: AUA M7. Material: ABS Power supply: 2 x AAA battery (battery not included) Power measurement range: -70~+10dBm Probe Type: For InGaAs Wavelength Range: 850-1700nm Standard wavelength (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°C. Storage temperature: -25-70°C. Automatic shut-off time: 10 minutes. Continuous battery life: no less than 40 hours Package list: 1 x optical power meter. 1 x neck strap. 1 x user manual (English language not guaranteed) Package List 1 x Optical Power Meter 1 x Lanyard 1 x User Manual