Features: brand new and high quality ● Ergonomic design, when holding the machine, the index finger presses the trigger switch on the back and clamps the fiber optic cable to automatically start the test ● Exquisite workmanship, comfortable for touch, simple and convenient operation ● Hidden red light source, stable and strong beam concentration, effectively cooperate with line detection ● Micro-bending test technology: accurately identify the direction of the fiber. When the fiber has a signal, the left and right direction lights show the signal direction. The left direction light is on, indicating that the light source is from right to left. ● Three signal frequencies can be identified: 270Hz/1KHz/2KHz signal frequency can be identified, and there will be a buzzer sound when identifying the frequency Specifications: Identified Wavelength Range:800-1700 nm Insertion Loss:1.0dB Color ：Black +Green Fiber Type:＜ 3mm Fiber Identified Signal Type:270Hz/1KHz/2KHz Display Type:LED Detector Type:1mm InGaAs Minimum detection power:-35dBm(1550nm) -30dBm(1310nm) Center Wavelength:650nm Output Power:10mW Material: ABS OperatingTemperature: 0~+50℃ Storage Temperature:-20~+60℃ Size: Approx.45x34x28x21x240mm/1.77x1.34x1.1x0.83x9.45inch Applications:Telecom Maintenance /CATV Maintenance/Fiber Optic lab testing/ Other Fiber Optic Measurements Package Includes: 1pcxOptical Fiber Identifier 1pcxUser Manual( not including battery) note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.