RR Deluxe Remote Release - 1 transmitter/1 receiverThe versatile transmitter can be programmed to operate as many as eight different receivers at once. COMPATIBILITY: Operates Dogtra PL and QL bird launchers as well as most other after market bird and dummy launchers. MULTIPLE LAUNCHERS: Each receiver will operate (2) launchers with the use of a 15 foot jumper cord (available as an optional accessory). Using this cable, you can operate up to 16 launchers from a single transmitter. MULTIPLE SOUND