Feature: 1. Energy And Power Saving: Short press the power on key to turn on the power saving function by default, 10 minutes without operation, automatic shutdown. When the power on state, long press the power on button, it cancels the function. 2. Back Clip Design: Simple and lightweight, small and delicate size, with a very good back clip design, users can comfortably fit into pockets, clip on clothes and carry around. 3. Ergonomics For User: The body design meets ergonomic requirements, making it more comfortable and easy for the person using it to use and work more efficiently. 4. LED Light: Our fiber optic tester is also equipped with an LED light, which makes it easy for the operator to check the line construction in a dark environment without being affected by the environment. 5. Universal Connector: This fiber optic tester uses a 2.5mm universal connector to meet multiple needs, and you can replace the adapter head and ceramic core by yourself. Specification: Item Type: Mini Visual Fault Locator Material: ABS Wavelength Range: 650nm Laser Type: LD Modulation Frequency: CW/2Hz Operating Temperature: -20℃ - +60℃ LED Flashlight: Support Power Supply: AAA 1.5V battery x2 (without). Package List: 1 x Mini Visual Fault Locator