3 in 1 Fiber Optic Tester 10 Wavelengths -70 To +10dBm Optical Power Meter 15mW 15km Visual Fault Locator and LED Light Item Type: Optical Fiber Power Meter Material: ABS Model: A C710B Power Testing Range: -70 to +10dbm Probe Type: InGaAs Wavelength Range: 850-1650nm Testing Accuracy: ±0.2dB 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 to +60℃ Storage Temperature (℃): -25 to +70℃ Auto Power Off Time: 10 Minutes Red Light Source Testing Distance: 15mW Output Wavelength: 650nm Size: Approx. 180x89x42mm / 7.09x3.50x1.65in Power: 3.7V Rechargeable Lithium Cell x 1, Capacity 650mah (Built in)