Features: Power Source: 6V – requires 4 AA batteries per receiver (batteries not included). Range: 150 meters. Each receiver includes an antenna. Fully programmable – assign any or all receivers to any button on the remote control. To program a receiver, insert a small tool into the programming hole on the receiver housing until the indicator light flashes, then press the desired button on the remote. Expandable – additional receivers (sold separately) can be added to increase the number of controllable channels. Interchangeable & Economical – if one receiver malfunctions, it can be replaced individually without needing to replace the entire system. Specifications: 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) Channels: 8 Range: 150 m (5905.5 in) Package Includes: 1 × Remote Controller 2 × Receivers 1 × Connecting Cable Notes: 1. Handle with care – avoid shaking or dropping. 2. Keep receivers as far away from fireworks as possible to prevent damage. 3. Remove batteries before long-term storage to prevent leakage. 4. Do not expose to damp, acidic, alkaline, or polluted environments. 5. Batteries are not included with this system.