Feature:1. Reliable Tester: High in accuracy and low in error, the optical power meter with backlight and clear view ensures reliable test results, easy to use.2. Wide Test Range: Can measure the optical absolute power of 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, with the test range of -70dBm ~ +10dBm.3. Extensive Using: Allows for flexible application in the detection and location of fiber breakage, poor connection, bending, cracking, etc., very useful.4. Great Red Light: The detector will emit 650nm bright red light for fiber tracking. Broken or fault point will refract light and form bright light around the area.5. Convenient Work: Comes with a light weight and a compact size as well, the optical power detector enables convenient storage and carrying for daily work.Specification:Item Type: Optical Power MeterPower Measurement Range: -70 ~ +10dBmProbe type: InGaAsWavelength Range: 850~1625nmStandard Wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm. Test Accuracy: 0.2dBOperating Temperature: -10 ~ +60Storage Temperature: -25 ~ +70Continuous Working Time of Battery: Not less than 40 hours. Automatic Shutdown Time: 10 MinutesRed Light Output Optical Power: 650nmBattery: 2 x AA battery, shipped without battery. .Package List:1 x SC Connector1 x Optical Power Meter1 x User ManualNote:Measure the range of maximum optical power according to the specified index.