This is a Replacement Transmitter Antenna for the Hitec/RCD Focus, Flash and Lynx Radios. This list is not a complete list of compatible radios. 3 CH: FM Focus 3 SS 4 CH: FM and AM aircraft 5 CH: FM helicopter 6 CH: FM aircraft YOU WILL RECEIVE: One Antenna SPECIFICATIONS: Length: 7-1/4" Extended Length: 3 foot 7-1/4 inches 6-13-94sk ir/jl &