Features: Accurately test whether a single network cable transmits signals normally. Added LED flashlight lighting function to facilitate line inspection in dark environments. Added wavelength memory function to remember the test wavelength set before shutdown after shutdown. Encapsulated case protection, can reduce the damage caused to the machine by accidental fall by a certain degree. Press LIGHT in different environments to turn the backlight on or off at will. You can self-adjustment test reference based on actual test requirements. Specifications: Test Range: -50 to +26dbm 650m red light source (optional): 10mw or 30mw Wavelength Range: 800~1700nm Standard Wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm。 Overall dimension（mm）：130*75*27 Weight（g）：126
