Valken has pulled all stops to come up with one of the smallest and lightest tracer units airsoft market today. Constructed from durable polymer and aluminum, the KILO Tracer Unit adds relatively no excess weight to your pistol or AEG. Players can use green or red tracer luminous BBs, which are lit up when the BB passes through the tracer unit; providing exceptional visibility in low light conditions. This tracer unit is specifically designed to be used with both airsoft rifles and pistols using the integrated 14mm CCW threadings for rifles and using the included pistol adapter to mount onto 11mm CW female barrels. A built-in rechargeable LiPO battery powers this tracer unit, and can be charged using the included micro-usb charging cable. To prolong battery life, an automated shutoff has been integrated into this tracer unit and will shut off once the user has been idle for 40 minutes or if the battery power indicator flashes three times requiring a charge. The overall compact design of this tracer unit makes it the perfect addition to any pistol or AEG, and will not obstruct your vision when using a scope or dot sight. Enhance your training sessions to dial in your aim for when it counts the most, with the help from the KILO Tracer Unit from Valken.