TRICOM TR-709 Mini Optical Power Meter and red light all-in-one machine series are controlled by single-chip microprocessor but multi-function. It can be well protected by using embedded detectors and laser. The whole machine has automatic shutdown function, three red light modes, backlight display, wavelength memory function, user calibration, wide test range, lighting, RJ45 cable sequence and cable tracker test functions. It is mainly used for continuous optical signal power measurement, optical fiber link loss test and optical fiber line on-off test. It is widely used in optical cable construction and maintenance, optical fiber communication, optical fiber sensing, Optical CATV and other fields.