Features Working range: mini fiber optic power meter, wavelength range 850-1650nm, power measurement range 50-26dBm, compact and practical. Easy Operation The optical power meter supports plug and play, fast and accurate, calculates relative power, and has a calibration function. Good Performance With sensitive chip and solid internal structure, this power meter provides stable performance, less interference and strong practicality. With Battery: Equipped with a 3.7V 650mAh polymer battery, can work continuously for 40 hours, and the USB cable is suitable for charging. PORTABLE SIZE The optical power meter is portable, easy to use, and covers most of communication technology repairing needs. Specification: Element Type: Optical Power Meter Model: AUA DC5. Material: ABS Probe type: InGaAs Wavelength Range: 850-1650nm Standard Wavelength (nm): 850,980,1270,1300,1310,1490,1550,1577,1625,1650 Automatic shut-off time: 10 minutes. Power measurement range: -50-26dBm Power supply: 3.7V 650mAh polymer battery (built-in battery) Package list: 1 x optical power meter. 1 x neck strap. 1 x USB cable. 1 x user manual (English language not guaranteed) Package List 1 x Optical Power Meter 1 x Lanyard 1 x USB Cable 1 x User Manual