Professional 12 Key Wireless Fireworks Launching System Detonators Remote Control . 12 KEY FIREWORK FIRING SYSTEM Characteristic: 1. Power source: 6 V requires only 4 AA batteries per receiver. 2. Range: 150 meters. Every receiver with an antenna. 3. Fully programmable match any or all do any button on any system remote control. If you want to program the receiver, insert a small stick into the hole in the receiver box. Then the light on the receiver will flash press the appropriate key on the remote control. Then the receiver will work with the remote. 4. Expandable Add other receivers (available individually) to increase the amount of memory. 5. Interchangeable and economical: If after some time of use one ma a small problem, you can use another instead. Or you just have to buy a receiver, you don't have to buy a remote. . 12 KEY FIREWORK FIRING SYSTEM Specification: Material: plastic Weight: 265 g/9,3 oz Frequency: 433 MHz Transmitter power source: 12V 23A battery (NOT included) Receiver power source: 4 * AA batteries (NOT included) Number of keys: 12pcs Range: 150 m/5905,5 inch . 12 KEY FIREWORK FIRING SYSTEM List of packages: 1 x pilot 1 x Receiver 1 set x connecting cable . 12 KEY FIREWORK FIRING SYSTEM