Features:Power Source: 6V - requires only 4 AA batteries per receiver.Range:150meters. Each receiver with the antenna.Fully programmable - make any or all receivers to any button on any system remote. If you want to programmer the receiver, please put in a small stick on the hole which is on the receiver box. And then the light on the receiver box will be flash-then press corresponding key on the remote. Then the receiver will work with the remote.Expandable - Add other receivers (available individually) to expand number of cues. Interchangeable andamp Economical: If one receiver has a little problem after used for a period, you could use others instead. Or you just need to buy the receiver, no need to buy the remote.Specification:Material: PlasticWeight: 265g or 9.3ozFrequency: 433MHzTransmitter Power Source: 12v 23A battery (NOT included)Receiver Power Source: 4xAA batteries (NOT included)Keys Quantity: 12pcsRange:150m or 5905.5inchPackage List:1 x Remote Controller 1 x Receiver1 Set x Connecting LineNote:1. Handle your product with care avoid shaking and dropping it.2. Keep the receiver as far away from your fireworks as possible to avoid damage.3. Please remove batteries before storage, for prevent defile incept box.4. Please do not place the product in the damp, sour, alkali and pollution environment.5. All the systems are NOT including batteries..