Check the listing for details. North Coast Rocketry Accessory LaunchMaster Launch Controller NCR 9825. Condition: New. Listed at 142.99 USD. North Coast Rocketry Accessory LaunchMaster Launch Controller NCR 9825 Heavy duty and sized for mid power rocketry Uses 300mAh Nickel Cadmium or Nickel Metal Hydride rechargeable battery Charge the battery thru the port on the side Audible Continuity Check 30 feet of wire allowing a safe distance for motors as large as G Removable Safety Key Cable holder on the unit to store your wire leads Design by Dave Meyers Made in the USA This North Coast Rocketry Accessory LaunchMaster Launch Controller has been tested and works with:Aerotech FirstFire Mini StartersAerotech FirstFire Jr. StartersAerotech FirstFire StartersEstes Startech StartersEstes Solar StartersEstes Sonic StartersQuest Q2G2 startersMJG Firewire Initiators (non-BATF regulated electric matches) The LaunchMaster features plenty of power to ignite clusters of up to seven motors at a time. The internal battery eliminates the fuss of hooking up to an external power supply. The unit features an integral charging jack so that you can plug the charger into the LaunchMaster and charge the battery without removing it. The LaunchMaster comes preassembled, using a heavy-duty case that easily fits in one hand. It includes a safety key with a bright red nylon loop, making it easy to find in the grass if you should drop it. It is proudly made in the USA. The clips have heatshrink tubing over the joint where the wire attaches to the smooth jaw micro clip. Not only does this help to prevent the metal clips from touching each other and shorting out, but it also helps prevent the connection from corroding from the rocket exhaust. Requires one 7.2volt, 3000 mAh (or greater) NiCad or NIMH battery pack with Tamiya connector (sold separately). Size: 6” x 3.5” x 2.3”(15.2cm x 8.9cm x 5.7cm) Weight: 22oz(720g)