Thoroughly tests whether a single network cable carries signals normally. Features an added LED flashlight for easy line inspection in dark environments. Includes a wavelength memory function to remember the set test wavelength before shutdown. A protective shell minimizes damage to the machine caused by accidental drops. Press LIGHT in various environments to turn the backlight on or off as desired. This lightweight photometer series product is primarily used for measuring optical signal capacitance tracking and closed-open testing via fiber optic paths. It uses a single-chip microprocessor for control and has complete functionality. It has been widely used in the construction and maintenance of optical cables, fiber optic communication, optical cable detection, CAT light range, etc. The design of the machine body models complies with the technical requirements of the human body, and it uses advanced cold casting technology, making it beautiful and practical. The power meter uses a built-in detector and laser, which protects it very well. The lightweight dynamometer has a delicate appearance, automatic shutdown, three types of backlight mode, and wavelength memory function. Features: Test Range: -70 to +6dbm Wavelength Range: 800~1700nm Standard Wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, 1650nm Uncertainty: ㊣ 5% 650m Red Light Source (Optional): Imw, 10mw, 20mw, 30mw Display Resolution: 0.1% linear display, 0.01dBm logarithmic display Battery: 2 * AAA Batteries, 1.5V, 250mAh Item Size: 130 * 63 * 29mm / 5.1 * 2.5 * 1.1in Item Weight: 310g / 10.9ounce Package Size: 260 * 150 * 100mm / 10.2 * 5.9 * 3.9in Package List: 1 * Fiber Optic Power Meter