Power Source: 6V requires 4 AA batteries per receiver (batteries not included). Range: Up to 150 meters with antenna on each receiver. Fully programmable system allows any or all receivers to be paired with any button on the remote. To program the receiver, insert a small stick into the programming hole on the receiver box; the indicator light will flash, then press the desired button on the remote. Expandable design supports adding additional receivers (sold separately) to increase the number of cues. Interchangeable and economical: If one receiver malfunctions after extended use, it can be replaced individually without replacing the entire system. Only the receiver needs to be purchased, not the remote. Specifications: Material: Plastic Weight: 265g (9.3 oz) Frequency: 433MHz Transmitter Power Source: 12V 23A battery (not included) Receiver Power Source: 4 x AA batteries (not included) Channel Quantity: 8 channels Range: 150 meters (5905.5 inches) Package List: 1 x Remote Controller 2 x Receivers 1 x Set of Connecting Lines Notes: 1. Handle the product with care; avoid shaking or dropping. 2. Keep receivers away from fireworks or high-impact environments to prevent damage. 3. Remove batteries when not in use to prevent corrosion. 4. Do not store or use the product in damp, acidic, alkaline, or polluted environments. 5. Batteries are not included with any component. 6. Product may vary slightly in design; new or old version will be shipped at random.