The RCB On/Off Fireplace Remote Control from Ambient provides a high quality accessory for use with a gas fireplace. The battery powered remote control transmitter operates on (3) AAA batteries that features simple On & Off buttons to remotely control the battery powered receiver box, that runs on (4) AA batteries. This remote control and receiver box set is intended for use with standard millivolt gas valve fireplaces or systems up to 24V and the transmitter can operate up to 20-feet away from the receiver box. The radio frequency operation offers 16 different security codes to ensure proper use.