Hayward AQL2-SS-RF Wireless Spa Side Remote Wireless spa side remote controls your system operation while sitting in the spa AQL2-SS-RF works in conjunction with AQL2-BASE-RF It requires AQL2-BASE-RF receiver to function Factory installed battery provides years of use before replacement Its 6 functions are filter pump, pool/spa valves, heater (on/off), lights and 2 auxiliary outputs LED to confirm communication