LONG OUTPUT DISTANCE: This 10mW visual fault locator output strong red light goes 10 kilometers , high effective power circuits allows for stable power. METAL PAINT DESIGN: It is designed with a stainless steel head and aluminum body to prevent crash and dust, and the case ground design prevents ESD damage efficiently. WIDELY USED: The 2.5mm universal connector of the detector is compatibly designed for ST, , , LC interferes both in a circle and square shape of different fiber optic cables. Test for both single-mode and multi-mode cables. Shell Material: Aluminum Pen-type Output Optical Power: more than 10mW Output Distance: 10KM Wavelength: 650nm 20nm Use Temperature: 0-60℃ Storage Stability: -20-70℃ Operating Model: Both CW and Pulse available Applicable interface: ST///LC (LC interface requires additional adapter) Power: 2 AA batteries (included) Colour: Black+Orange Material: Metal Package Contents: 1 * 10mW Pen-type VFL 1 * Carrying Bag 1 * Lanyard 1 * English Manual 2 * AA Batteries Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.