There are several popular brands of thermostats and some have different added features. If you do a search you'll find out alot. I need one asap so I ordered the basic original Herpstat (that's the model) since Spyder Robotics (the manufacturer) is just in the state south of me. MG Reptiles also posts often with this type of equipment for sale but again a search will bring up alot of info and topics which you can post in if something is not covered clearly enough.