- Compact body: Integrated detachable design, small size, lighter and thinner, easy do carry. - High-precision sensor: high sensitivity, high precision, and high responsiveness. - High-resolution LCD screen: The clear LCD display with backlight allows you to clearly read the value even in dark environments. - LED lighting function: Equipped with a small bright LED lamp, which can act as a flashlight do simple inspection in the dark. - 3 types of interfaces supported: FC interface, SC interface and ST interface. - 7 optical wavelengths do selection: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm and 1625nm. - Self-calibration: adjust the do test parameters according to the actual test. - Automatic shutdown: no operation within 10 minutes, energy saving. - Additional Features: 5 km high-resolution red light,replaceable ceramic core, selectable intelligent standby mode,energy-saving design, dual power mode,switchable units, network cable test, wavelength data memory,frequency identification, overcharge protection,overcurrent protection, voltage protection, power protection,Short circuit protection and temperature protection. - Wide application: used in fiber optic engineering, fiber optic sensor research, optical component manufacturing, optical element testing, etc. Technical data: Material: ABS Colour yellow Connector: FC / SC / ST Power Measurement Range: -70-3dBm Accuracy: 0,2 dBm Logarithmic display resolution: 0,01 dBm Line Display Resolution: 0,1% Wavelength Range: 800-1700nm Reference do wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Red Work Light Wavelength: 650nm Operating temperature: -10-60℃ Storage temperature: -25-70℃ Automatic shutdown: no operation within 10 minutes Product Size: Approx. 118 x 65 x 30mm/4,65 x 2,56 x 1,18 inch Product Weight: Approx. 140g/4,94 oz 130 x 77 x mm / 5.12 x 3.03 x 2.36in Package Weight: Approx. 300g/10.58 oz Note: Read the user manual before use. List of things do packing: 1 x optical power meter 1 x Network Test Module 1 x ceramic core; 1 x leash 1 x User Manual (English)