Features: Power Source: 6V - requires only 4 AA batteries per receiver. Range: 150 meters. Each receiver includes an antenna. 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. The light will flash; press the corresponding key on the remote. The receiver will then operate with the remote. Expandable - Add additional receivers (sold separately) to increase the number of cues. Interchangeable & Economical: If one receiver malfunctions after extended use, replace it individually. Purchase only the receiver unit without needing to buy a new remote. Specification: Material: Plastic Weight: 265g / 9.3oz Frequency: 433MHz Transmitter Power Source: 12V 23A battery (NOT included) Receiver Power Source: 4 x AA batteries (NOT included) Number of Keys: 12 Range: 150m / 5905.5 inches Package List: 1 x Remote Controller 1 x Receiver 1 Set x Connecting Line Note: 1. Handle the product with care; avoid shaking and dropping. 2. Keep the receiver away from fireworks to prevent damage. 3. Remove batteries before storage to prevent corrosion. 4. Do not place the product in damp, acidic, alkaline, or polluted environments. 5. Batteries are NOT included with any system components.