Replacement UN3 receiver box for Sky Con series remote controls - works only with SKY-CON and SKY-CON-TH systems - The UN3 Receiver box operates on (4) AA batteries - Receiver box features Learn function to pair with existing remote control and manual slider switch with Off/Remote/On positions - Receiver box is designed for use with only 6 volt AF Series gas valves only and acts as the On/Off contact switch meaning the receiver will supply the voltage to operate the gas valve - Includes receiver box and batteries only.