Easily control your terrarium environment with minimal effort using the REPTI ZOO 3-in-1 Smart Day & Night Timer Temperature & Humidity Controller. This smart controller monitors humidity and temperature and automatically switches plugged-in humidifiers， heaters and lamps on and off to maintain your pre-programmed settings. An additional timer plug lets you switch lights or other accessories on and off at set times and an easy-to-read LED display shows all your settings and readings in one place. Use the tropical and desert modes to quickly set up desired environments or custom program day and night temperatures， humidity levels and up to four timed presets—there’s even an alarm to warn you of extreme temperatures that can harm your pets and a built-in memory chip to restore your settings after a power failure. Take the work and guesswork out of caring for your buddies with this terrific smart controller and sensor!