The Terma KTX-4 Element is designed specifically to work with the TS1 Terma Element probe to provide a fully functioning heating element. Providing a choice of internal temperature (30 degrees to 60 degrees) or ambient room temperature (15 degrees to 30 degrees) regulation with a 7 day timer included. 4 featured buttons make this easy controller among the easiest to use on the market, coupled with bluetooth smart phone control.