Wavelength Range: 800 - 1700nm Signal Identification Type: CW, 270Hz ±5%, 1kHz ±5%, 2kHz ±5% Detector Type: φ1mm (2 pcs) Compatible Fiber Type: Universal φ0.25/φ0.9 (for bare fiber); φ2.0, φ3.0 (for pigtailed fiber) Signal Direction: LED indicator for left and right directions Signal Frequency Range: 270Hz, 1kHz, 2kHz Optical Power Meter Measurement Range: -70 to +10dBm/-50 to +26dBm Detector Type: Wavelength Range: 850 to 1650nm Standard Wavelengths (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: Linear: 0.1%; Logarithmic: 0.01dBm Operating Temperature (℃):-10℃ to +60℃ Storage Temperature (℃):-25℃ to +70℃ Auto Power Off Time (min):10 minutes Red Light Source Output Power: equal 10mW Red Light Source Output Wavelength:650nm Dimensions (mm):240 x 47 x 30 mm Power Supply:9V alkaline battery(Not included batteries) Color:Red Material:plastic Package Contents: 1 * fiber optic signal identifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.