Optical Power Meter 3 in 1 Portable Rechargeable Fiber Optic Tester Visual Fault Locator with LED Light OPM VFL Item Type: Optical Power Meter Material: ABS Power Testing Range: -50 to +26dbm Probe Type: for InGaAs Wavelength Range: 850 to 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 Operating 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 Supply: 3.7V Rechargeable Li Battery x 1 Capacity 650mah (with built in battery)