Precision CNC aluminum outer shell construction with a black anodized finish Lithium Ion rechargeable battery allows for quick charging and can last up to hours before having to charge 3 light modes (Tracer Only, Tracer & Flame, or Flame Effect Only) Ultra sensitive sensors ensures reliable BB illumination even in high rate of fire airsoft rifles Included 11mm to 14mm thread adapter allows for this tracer unit to be used on an airsoft pistol