Key Features: High Laser Output Power: The visual fault locator boasts a laser output power of ≥10mW, ensuring clear and accurate fault detection over long distances. Extended Fiber Length Range: Supports optical fiber lengths from 8 to 10 kilometers, making it ideal for comprehensive network testing. Versatile Optical Fiber Adapter: Comes with a 2.5mm FC general connector, compatible with various standard fiber optics, enhancing its utility in different environments. Long-lasting Battery Life: Powered by a 3.7V 1050mAh polymer lithium battery, it offers more than 7 hours of continuous use. User-Friendly Design: Features a high-brightness LED flashlight, a battery status display with four blue LEDs, an auto power-off function, and is USB rechargeable for added convenience. Specifications: Brand: UNI-T Model: UT691-10 Laser Output Power: ≥10mW Optical Fiber Length Range: 8~10km Wavelength of Red Light: 650±10nm Optical Fiber Adapter: 2.5mm FC general connector Battery Type: 3.7V 1050mAh polymer lithium battery Battery Life: >7 hours Battery Status Display: Four blue LED indicators Green Indicator: Indicates auto power-off state Laser Mode: Continuous mode/Pulse mode Charge Voltage and Current: DC 5V APO (Auto Power Off): 15 min auto power off (manual adjustable) Warning Symbol: Yes Key Press Test: >5000 times Drop Test: 1m Product Color: Red and grey Product Net Weight: 62g Product Size: 130mm x 38mm x 27mm Package Includes: 1 x UT691-10 Visual Fault Locator 1 x USB Charging Cable 1 x User Manual