Check the listing for details. 12CH Wireless Fireworks Firing System New remote function 4th of July display. Condition: New, Made in China. Listed at 29.85 USD. Thank you for purchasing our 12 channel remote firing system. We are sorry we could not include batteries but this is not allowed when shipping by air freight. Your purchase includes three receivers and one transmitter to give you a total or 12 channels.This firing system has incresed two new function. the "SEQ"button is means when you press it the fireworks can be fire one by one. The "ALL"button on the remote is means when you press it the fireworks can be fired all together. Power: Receiver: 4 AA batteries Transmitter: 12v 23A battery Range: 150 meters (492 feet) The receivers are very economical. They can be used independently. If one fails, the others will continue to operate. This system is expandable. Simply purchase more receivers from the website below. The receivers come.