Digital Temperature Controller for Beer Fermentation & Kegerator, Dual Outputs Plug-n-play controller. No wiring is needed for the heater or cooler. Two independent outputs, one for heating and one for cooling. A digital silicon band gap sensor. Immersible in water. Sensor cable has food grade silicone insulation. Can display temperature in Celsius or Fahrenheit. Has high and low limit alarms. Build-in audio buzzer.