Features 1、Smart Testing: The handheld optical power meter is controlled by a single chip microprocessor and is mainly used for measuring the power of continuous optical signals. 2、Wide in Utility: Widely used in various fields such as fiber optic construction and maintenance, fiber optic communication, fiber optic sensing, and optical CAT. 3、Various Function: This machine adopts a built in detector, which can provide good protection. It has a compact appearance, automatic shutdown function, wavelength memory function, manual calibration, fiber optic work recognition, and a wide testing range. 4、Reliable Working: Support automatic frequency recognition function, and automatically display the corresponding frequency icon upon receiving the fiber frequency. Support multi band high accuracy light attenuation testing. Color LCD screen display. 5、Built in Battery: Large capacity lithium battery for longer battery life. The battery level is displayed in real time with 5 bars, and the remaining power is clear at a glance. You can use a mobile phone charging adapter and mobile power supply to charge the device's battery life. Specification Item Type: Optical Power Meter Measurement Range: -50~+26dBm Wavelength Range: 800~1700 Interface Type: 2.5mm universal adapter. Probe Type: InGaAs Detection Area: 300um Uncertainty: ± 5% Standard Wavelengths: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm Linear Display Resolution: 0.1% Logarithmic Display Resolution: 0.01dBm Working Temperature: -20~+60 ℃ Storage Temperature: -25~+70 ℃ Drop Height: ≤ 2m Static Current: ≤ 2uA Working Current: ≤ 35mA Charging Current: 300mA Charging Time: ≤ 3h Automatic Shutdown Time: 10min Range Time: ≥ 13h Standby Time: ≥ 3 Days Power Supply: Lithium battery or USB external power supply. Battery: 1 x rechargeable lithium battery, 400mAh. Shipped with built in battery. Package List 1 x Optical Power Meter 1 x USB Cable 1 x User Manual