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—additional receivers may be purchased separately. 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 Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement tolerance is ±1–3 cm.