Acetech is founded by former Xcortech team members to build better airsoft related electronics 1. The Lighter S, is a smallect and lightest tracer unit designed for the pistol. 2. Because of its small dimension, it enables users easily to install it into their silencers or airsoft gun hand-guards as long as their inner space is larger than the dimension of Lighter S. (Diameter: 27mm or 1.06 inches, length: 67.3mm or 2.65inches) 3. Lighter S could light up green tracer BBs with very high brightness but lighten red tracer BBs with medium brightness. 4. Do not disassemble the Lighter S to prevent high voltage electrical shock. 5. It automatically switches off under the following conditions: A. Device has idled for 40 minutes B. When the battery power is low, after the power indicator blinks in red color for 3 seconds. 6. Remaining power indicator (flash once per second) A. Green light: high power B. Orange light: medium power C. Red light: low power 7. Do not look straight into the muzzle to check the installation of the device to prevent any accident like mistakenly pulling the trigger or firing the gun. 8. In order to extend the built-in Li-Poly battery Accessories: MicroUSB charging cable x 1 Adaptor x 1 (M11 clockwise thread to M14 anti-clockwise thread) Q&A Q1:Does Lighter S fit on my airsfot gun? A1: Lighter S fits on any 14mm CCW and 11mm CW barrels (By adapter) Q2: How can I unscrew adapter from Lighter? A2: Unscrew it clockwisely. ***Recharge your battery in every 2 month***