Feature:1. Back Clip Design: Ergonomically designed with back clip, small in size and light in weight, easy to put into a clothes or pant pocket.2. Energy Saving: When the meter is in power saving function, will automatically shut down if there is no operation for 10 minutes, save power greatly.3. 7 Wavelengths: The meter has 850nm 980nm 1300nm 1310nm 1490nm 1550nm 1625nm 7 wavelengths, which can be switched at will.4. LED Light and Universal Interface: Equipped with LED, easy to operate in dark environment, 2.5mm universal interface can meet multiple needs, you can replace the adapter head and ceramic core.5. Self Calibration Function: The meter has self calibration function, you can adjust the value by yourself, the measurement is flexible and accurate.Specification:Item Type: Fiber Optical Power MeterMaterial: ABSWavelength Range: 800-1700nmProbe Type: InGaAsInterface: 2.5mm general interfaceError: <0.2dBStandard Wavelength: 850nm 980nm 1300nm 1310nm 1490nm 1550nm 1625nmDisplay Resolution: 0.01dBOperating Temperature: -10 to +60Storage Temperature: -25 to +70Automatic Shutdown Time: 15 minWorking Hours: 20 hoursLED Flashlight: SupportPower Supply: 2 x AA battery 1.5V (not included).Package List:1 xFiber Optical Power Meter