Inkbird 110V Temperature Controller ONE Relay ONE Alarm Output Fahrenheit and Centigrade Display Thermostat with NTC Sensor ITC2000 for Terrarium Aquarium Reptile (ITC-2000 110V) One relay (Heat -OR- Cool) & One Alarm NOTICE: Two relys: one is normal relay output, and the other one is ALARM relay output. Temperature Measuring Range: -50-210 Degree F / -50 oC-99 Degree C. / Display Can Be Choose Fish Tank, Terrarium, Pet, Incubator Thermostat