Remote transmitter operates on (2) 1.5V AAA batteries; receiver operates on (4) AA batteries, best with Polaroid batteries. The Napoleon F-45 on/off remote control provides a convenient way to operate a gas heating appliance with the simple click of a button. The remote control transmitter operates with (2) AAA batteries and uses a simple 2 button On/Off system to transmit a wireless signal to the battery powered receiver, which uses (4) AA batteries. The receiver connects to all standard millivolt gas valves and communicates with the remote transmitter via radio frequency signals. Enjoy a beautiful, warm fire without sacrificing the convenience of a wireless remote control - from Napoleon, a leader in the hearth industry.