Features: 1.High Accuracy Measurement: Equipped with a high accuracy sensor, the optical power meter accurately measures optical power by quickly capturing values from light sources, ensuring precise fiber optic line detection and testing with reliable results. 2.Rechargeable Design: The optical power meter features a built in rechargeable lithium polymer battery with USB fast charging, providing long lasting battery life. Its mini size design makes it lightweight and portable, convenient for carrying on the go. 3.Illumination Function: With an LED flashlight, the optical power meter provides illumination, making it easy to perform construction in dark environments. The high definition display screen ensures clear readings regardless of day or night. 4.7 Wavelength Memory: The tester has intelligent 7 wavelength memory. With a short press of the button, it cycles through the 7 testing wavelengths, meeting various testing requirements. The power meter also saves the last wavelength used even after power off. 5.Universal Interface: The fiber optic tester supports three commonly used fiber optic interfaces ? SC, FC, and ST, allowing for plug?and?play convenience. It also offers self?calibration and factory reset functions, along with frequency autodetection. 6.Versatile Applications: The fiber optic detector can be used in various fields such as fiber optic communication, fiber optic maintenance, and fiber optic research, making it suitable for your work and project implementation needs. specification:Item Type: Mini Optical Power Meter Material: ABS Measurement Range: -70 to +6 dBm Battery: Built in Polymer Lithium Battery (400mAh) LED Light: Flashlight function PackageList: 1 x Optical Power Meter 1 x Charging Cable 1 x Hanging Rope