Feature:1. 650NM RED LIGHTING: The detector will emit 650nm bright red lighting for fiber tracking, broken or fault will refract light and form bright light around the fault area.2. STABLE LIGHT SOURCE: The detector with stable light source can easily and accurately detect and locate fiber breakage, poor connection, bending or cracking.3. WIDE RANGE: Optical fiber cable tester can measure 850 980 1300 1310 1490 1550 1625nm other 7 wavelength optical absolute power, with the test range of 70dBm to +10dBm.4. 2.5MM UNIVERSAL INTERFACE: The connector of the detector is specially designed for ST, SC, FC interfaces, more convenient for operation.5. LONG BATTERY LIFE: The fiber optic cable tester can work for 40 hours and then automatically shut down.Specification:Item Type: Optical Power MeterMaterial: ABSModel: DXL 50DPower Measurement Range: -70 to +10dBmProbe Type: InGaAsWavelength Range: 850-1625nmStandard Wavelength (nm): 850 980 1300 1310 1490 1550 1625Display Resolution: Linear Display: 0.1dBmLogarithmic Display: 0.01dBmWorking Temperature (): -10 to +60Storage Temperature (): -25 to +70Automatic Shutdown Time (Min): Not less than 40 hoursOutput Optical Power of Red Lighting Pen: 650nmBattery: AA x 2 (shipped without battery).Package List:1 x SC Head1 x Optical Power Meter1 x User ManualNote:Measure the range of maximum optical power according to the specified index.