1. Power Source: 6V - requires only 4 AA batteries per receiver. 2. Range: 150 meters. Each receiver with the antenna. 3. Fully programmable - make any or all receivers to any button on any system remote. If you want to program the receiver, please put a small stick in the hole which is on the receiver box. And then the light on the receiver box will flash, then press. 4. Expandable - Add other receivers (available individually) to expand number of cues. 5. Interchangeable & 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. 6. Specification: Material: Plastic; Weight: 265g/9.3oz; Frequency: 433MHz; Transmitter Power Source: 12v 23A battery (NOT included); Receiver Power Source: 4*AA batteries (NOT included); Channel Quantity: 8pcs; Range: 150m/5905.5inch. 7. Package List: 1 *Remote Controller, 2 *Receiver, 1 Set *Connecting Line. 8. Note: 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, to 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. 6. Please Note: that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.