Power: Receiver: 4 AA batteries; Transmitter: 12V 23A battery Range: 150 meters (492 feet) The receivers are economical and can be used independently. If one fails, the others will continue to operate. This system is expandable—simply purchase additional receivers. The receivers come pre-programmed for convenience and are reprogrammable. To reprogram, locate the small hole in the center of the receiver and insert a paperclip or similar object. The receiver will flash; then press the corresponding key on the remote to complete pairing. Caution! 1. Handle the product with care—avoid shaking and dropping. 2. Keep the receiver as far away from fireworks as possible to prevent damage. 3. Remove batteries before storage. 4. Store the product in a clean, dry area, away from contaminants. Frequency: 433 MHz This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Color: As shown Material: Plastic Package Contents: 1 x Receiver 1 x Transmitter Only the items listed above are included; other products are not included. Note: Light reflection and differences in display screens may cause slight color variation between the image and the actual product. Measurement tolerance is ±1–3 cm.