Features: - Compact housing: detachable integrated design, mini size, lighter and thinner, easy to carry. - High precision sensor: high sensitivity and a high precision and response speed. - High definition LCD display: Clear LCD display with backlight allows you to read values ​​clearly even in the dark environment. - LED light function: Equipped with a small bright LED light, which can play a role as a flashlight for simple inspection in the dark. - 3 types of interface supported: FC interface, SC interface and ST interface. - 7 optical wavelengths for selection: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm and 1625nm. - DIY AutoCalibration: Adjust the test parameters at will according to the actual test. - Automatic shutdown: No operation in 10 minutes, energy saving. - Additional Features: 5 km high-definition red light, replaceable ceramic core, intelligent sleep mode selection mode, energy-saving design, dual power supply mode, switchable units, network cable test, WiFi test, storage of result, wavelength data memory, frequency identification, overload protection, overcurrent protection, overvoltage protection, overload protection, short circuit and overheating protection. - wide application: applied in fiber optic engineering, fiber optic sensor research, optical element production, optical element research, etc. </p > Features: Material: ABS Color yellow Power supply: 2 * 1.5V AAA battery (not included) / USB connection Connector: HR / SC / ST Power Measurement range: -70~+3dBm Accuracy: ±0.2dBm Logarithmic Display Resolution: 0.01dBm Linear display resolution: 0.1% Wavelength range: 800~1700nm Reference Wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Red Light Working Wavelength: 650nm Operating temperature: -10~60℃ Storage temperature: -25~70℃ Auto shut-off: No operation within 10 minutes。 Please read the User Manual before use. Packing List: 1 * Optical Power Meter 1 * Network Test Module 1 * Ceramic Core 1 * Lanyard 1 * User Manual (English)</ p> Note: the data is manual measurement, please allow 1-49cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.