Power Source: 6V - requires 4 AA batteries per receiver (batteries not included). Range: 150 meters with antenna on each receiver. Fully programmable – assign any receiver to any button on the system remote. To program, insert a small stick into the hole on the receiver box; the light will flash, then press the desired button on the remote. Expandable – add additional receivers (sold separately) to increase the number of cues. Interchangeable and economical – if one receiver malfunctions after extended use, replace only the receiver without needing to purchase a new remote. Specifications: Material: Plastic Weight: 265g Frequency: 433MHz Transmitter Power Source: 12V 23A battery (not included) Receiver Power Source: 4 x AA batteries (not included) Channel Quantity: 8 channels Range: 150m (5905.5 inches) Package List: 1 x Remote Controller 2 x Receivers 1 x Connecting Line Notes: Handle with care; avoid shaking or dropping. Keep receivers away from fireworks to prevent damage. Remove batteries before storage to prevent corrosion. Do not place in damp, acidic, alkaline, or polluted environments. Batteries are not included with any components. Product may vary slightly in design; units are shipped randomly based on availability.