Can measure 8 standard wavelengths: 850, 980, 1300, 1310, 1490, 1550, 1625nm. Test range: -70dBm to +6dBm. Features a 10mW red light source. Supports lighting, automatic shutdown, backlight selection, wavelength memory function, and user calibration. Compatible with FC/SC/ST 2.5mm universal interface. Supports RJ45 testing. Displays linear mW and non-linear index dBm simultaneously. Combines a light power meter and visual fault locator (VFL). Offers high test precision, fine workmanship, and is easy to carry. Designed to fully replace separate optical power meter and red pen tools. Specifications: Material: Plastic Size: 11.8 x 6.5cm Color: Yellow Calibration Wavelength: 8001700nm Optical Connector: FC/SC/ST universal interface Detector Type: InGaAs Measurement Range: -70 to +3dBm Accuracy: 0.2dB Standard Wavelengths: 850, 980, 1300, 1310, 1490, 1550, 1625nm Display Resolution: mW: 0.1%, dBm: 0.01dBm VFL Output: 1mW at 650nm Working Temperature: -10C to +60C Storage Temperature: -25C to +70C Auto Power-Off: 10 minutes Red Light Power: 5mW Power Supply: 2 x AAA batteries (not included) Battery Life: Up to 48 hours continuous operation Package Contents: 1 x Fiber Optical Power Meter 1 x Lanyard Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement error allowance: 13cm.