Feature: 1. Non‑contact connection, lossless fiber and transmitter end face, the output power is not affected by voltage fluctuations. 2. Small size and lightweight, pen‑type design with lanyard make it portable, easy to check fiber faults with visual fault locator. 3. High power, stable output, red light visible to the human eye, strong penetrating power, and the light leaking at the fault point is still clearly visible through the 3mm PVC layer. 4. The use of high‑quality aluminum alloy material, wear resistance, prevent collision, good appearance protection, exquisite fashion. 5. Suitable for optical fiber wiring, communication room, link transmission equipment, optical fiber communication, communication base station, and transceiver equipment. Specification: Item Type: Visual Fault Locator Material: Aluminum Alloy Color: As shown in the picture Model: AUA-20 Battery: 1.5V 2 x AA batteries (not included) Application: Optical fiber wiring, communication room, link transmission equipment, optical fiber communication, communication base station, transceiver equipment Basic Parameters: Output Optical Power: >20mW Output Wavelength: 650nm±10nm Optical Fiber Adapter: Universal Connector Operating Temperature: 0~+60℃ Storage Temperature: -20~+70℃ . Package List: 1 x Visual Fault Locator (Battery Not Included)1 x Light Guide Tube1 x Portable Bag1 x Lanyard1 x Instruction Manual Note: 1. Do not look directly at the laser light when using it, so as not to cause damage to the eyes.2. When not in use, please take out the battery to avoid battery leakage and cause aluminum parts to oxidize and become non‑conductive.