Power Source: 6V requires 4 AA batteries per receiver (batteries not included). Range: Up to 150 meters with antenna on each receiver. Fully programmable – assign any or all receivers to any button on the system 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 – add additional receivers (sold separately) to increase the number of cues. Interchangeable and economical – if one receiver becomes damaged 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 the receiver away from fireworks or explosive environments to prevent damage. 3. Remove batteries when not in use to prevent corrosion. 4. Do not place the product in damp, acidic, alkaline, or polluted environments. 5. Batteries are not included with any component of the system. 6. Please note that new and old versions of this product may be shipped randomly. Confirm acceptance before ordering.