We're seeing more airsoft YouTubers talking about the T238 RGB tracer unit and L'antre Du Dingo got one to review. As mentioned previously, this tracer unit not only works with airsoft BBs but also with NERF dart and Gel ball blasters. This is a rechargeable tracer unit with a battery capacity of 760mah and comes with a 14 CCW and 19mm to 16mm adapters.