This is what I received from Air Launch King in an e-mail.
MAX POWER REMOTE control system (MPR)
Air Launch King Inc. is proud to present the MAX POWER REMOTE control system. After many complaints of normal remote controls not being reliable and a lack of power, The MAX POWER REMOTE was designed. The MAX POWER REMOTE was selected and used by the UKC Fall 2003 Grand Hunt Test Committee over Tritronics and Dogtra. The MAX POWER REMOTE receiver uses a 12 VDC rechargeable battery that is 3 times stronger. With increased power recharging is decreased and reliability is increased. The receiver is housed in a water proof PVC housing which protects the battery and electronic components and has an attached 6 feet output cord which requires not additional cords. The receiver uses a wire for its antenna with a 500 yard operating range. The transmitter will control 4 receivers by pushing 1 of 4 buttons instead of rotary switches. Works with all wingers, either Solenoid or Servo releases, like the Shur-Flyte, Zinger Winger, Max 5000 launchers, release boxes, and more. The cost of the receiver is $110.00 and the transmitter, and charger is $70.00.