Acumen RCK-D Timer/Thermostat Fireplace Remote Control provides thermostatic remote control, along with a timer function, for gas heating fireplaces with the simple click of a button. The remote control transmitter operates on (3) 1.5V AAA batteries that operate 6 distinct buttons (MANUAL ON-OFF/AUTO ON-OFF/CLOCK/TIMER/UP/DOWN) to communicate wirelessly to a 110V AC powered receiver. Features: Convenient Design - The battery powered R.F. transmitter gives wireless remote control to a gas fireplace Easy to Use - 6-Button On-Off/Auto On-Off/Clock/Timer/Up/Down remote control transmitter provides simple control to a connected fireplace Easy to Read - Clear LCD screen displays room temperature in degrees Fahrenheit and Celsius Timer Control - Timer feature allows the user to set a desired amount of time the fireplace will operate, can be set Multi-Purpose Design - Multi-Purpose 110V receiver has 10 foot range, also allows manual control of fireplace with On/Remote/Off settings Durable Construction - Heat protective shield with insulation helps withstand high temperatures Safe Operation - Child proof feature allows a switch to enable child proof setting For Use With - Receiver box is designed for millivolt gas valves only and acts as a dry contact switch (the receiver will not output any voltage) Added Safety - Safety feature includes 6-hour safety timer that can be enabled Compatible with the following Millivolt Kits: MVK-N, MVK-P, MVK-NQM, MVK-PQM, UMVK-NP, MVK-EI, and MVK-HC.