Ultra-compact design; less than 2.5" long and a little over 1" in diameterFlame mode simulates a bright muzzle flash to help add a little bit of realism to your airsoft gun!Three modes available: tracer with flame, flame only, tracer only40 minute auto power offBuilt-in rechargeable lithium battery and Micro-USB charging portSuitable for Green Tracer BBs25mm Positive threads. Designed for the WE-Tech Galaxy Pistols