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 receiver to any button on the system remote. To program, insert a small stick into the 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 malfunctions after extended use, replace only that unit without needing to purchase a new 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 Connecting Line 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 avoid corrosion. 4. Do not place the product in damp, acidic, alkaline, or polluted environments. 5. Batteries are not included with any component. 6. Please note that either the newer or older version of this product may be shipped at random. Ensure you are comfortable with this before placing your order.