A. Professional 12 Channel Wireless Fireworks Firing System Igniters Remote Control -q B. Features: 1. Power Source: 6V - requires 4 AA batteries per receiver. 2. Range: 150 meters. Each receiver has an antenna. 3. Fully programmable - assign any or all receivers to any button on any system remote. To program the receiver, insert a small stick into the hole on the receiver box; then the light on the receiver box will flash, followed by pressing. 4. Expandable - Add other receivers (available individually) to increase the number of cues. 5. Interchangeable & Economical: If a receiver has minor issues after some use, others can be used instead. Or, only the receiver needs to be purchased, without needing to buy the remote. C. 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 D. Package List: 1 * Remote Controller; 2 * Receiver; 1 Set * Connecting Line E. Note: 1. Handle the product with care to avoid shaking and dropping. 2. Keep the receiver as far from fireworks as possible to prevent damage. 3. Remove batteries before storage to prevent contamination of the receiver box. 4. Do not place the product in damp, sour, alkaline, or polluted environments. 5. All systems do not include batteries. 6. Note: The new and old types of this product will be sent randomly; please confirm you do not mind before ordering.