Our EOD technicians have received 6 BomBots from the Air Force. These units were designed to remotely detonate roadside bombs, (EOD). Four are new and 2 are used, but none have the transmitter, only the receiver. The transmitter is a bi-directional 5-channel, spread spectrum 2.4Ghz unit made by Nomadio, model GC205. I found the 15-page owner's manual for the R/C but it is woefully lacking in technical information.