Features: - Compact Body: Humanity Design, mini size, lighter & thinner, easy to carry. - High-precision Sensor: High sensitivity & high precision & high response speed. - High-definition LCD Screen: The clear LCD display with backlight enables you to read values clearly even in the dark environment. - LED Lighting Function: Capable of playing a role as a flashlight for line checking and constructing in the dark. - 900mAh Rechargeable Lithium Battery: Large capacity lithium battery, USB charging mode, longer lasting & more convenient power supply. - Universal Interface Design: Suitable for 2.5mm universal adapter. - Automatic Shutdown: No operation within 10 minutes, saving energy. - 7 Optic Wavelengths for Selection: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm and 1625nm. - Additional Features: Wavelength data memory, frequency identification, self calibration, overcharge protection, over current protection, over voltage protection, over power protection, short circuit protection and temperature protection. - Wide Application: Applied in optic fiber engineering, optic fiber sensor research, optic elements production, optic elements research, etc. Specifications: Material: ABS Color: Black&Silver Power Supply: 3.7V 900mAh lithium battery Interface Type: Suitable for 2.5mm universal adapter Charging Time: ≤3 hours Duration: ≥18 hours Detecting Area: 300m Power Measuring Range: -70~+3dBm Logarithmic Display Resolution: 0.01dBm Linear Display Resolution: 0.1% Wavelength Range: 800~1700nm Accuracy: ±5%(nm) Wavelength Reference: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Operating Temperature: -20~60 Storage Temperature: -25~70 Automatic Shutdown: No operation within 10 minutes Item Size: Approx. 127*45*20mm / 5*1.77*0.79in Item Weight: Approx. 87g / 3.07oz Package Size: Approx. 150*62*40mm / 5.91*2.44*1.57in Package Weight: Approx. 110g / 3.88oz Note: Please read the Users Manual before use. Packing List: 1 * Optical Power Meter 1 * USB Charging Cable 1 * Users Manual(English)