Feature:1. 10 WAVELENGTHS: This optical power meter can test standard 850 980 1270 1300 1310 1490 1550 1577 1625 1650nm wavelengths.2. UNIVERSAL INTERFACE: Designed with universal interface, supports for FC SC ST adapter, could cover most requirements of communication engineering.3. MULTI FUNCTIONS: The meter has the functions of relative power calculation, calibration, high brightness LED light, backlit screen display, etc., very practical.4. SENSITIVE AND PRECISE: Using sensitive chip, the measurement is fast and accurate, without waiting for preheating, plug and play.5. LOW POWER CONSUMPTION: The battery consumption is low, and supports more than 120 hours of continuous operating.Specification:Item Type: Optical Power MeterMaterial: ABSModel: TM570ALWavelength Range: 800-1700nmOptical Connector: Universal connector (SC FC ST)Interface Type: InGaAsMeasurement Accuracy Error: andlt 5 percent Standard Measurement Wavelength: 850 980 1270 1300 1310 1490 1550 1577 1625 1650nmDisplay Resolution: Linear display 0.1 percent , logarithmic display 0.1dBmIdentifiable Frequency: 270Hz, 300Hz, 1kHz, 2kHzPower Supply: Li battery 3.7V capacity 700mah (built in)Interface: Micro USBBattery Duration: 120h (optical power meter function)Automatic Shutdown Time: 10 minutes.Package List:1 xOptical Power Meter1 x USB Cable1 x Manual1 x LanyardNote:This product does not have a VFL (red light) function.