Features WORKING RANGE: Mini optical fiber 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 calibration function. GOOD PERFORMANCE: With sensitive chip and solid internal structure, this power meter has stable performance, less interference and strong practicability. WITH BATTERY: Equipped with 3.7V 650mah polymer battery, can work continuously for 40 hours, and the USB cable is convenient for charging. PORTABLE SIZE: The optical power meter is portable design, easy to operate, and covers most of the needs of communication engineering repair. Specification: Item 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 Shutdown Time: 10 minutes Power Measurement Range: -50-26dBm Power Supply: 3.7V 650mah polymer battery (built in battery) Package List:1 x Optical Power Meter1 x Lanyard1 x USB Cable1 x User Manual Package List 1 x Optical Power Meter 1 x Lanyard 1 x USB Cable 1 x User Manual