Touch screen interface. Five fan control through an intuitive interface. Ultra fast selection and response time. Display temperatures in both F and C. Light switch turns off the meter when sleeping. Automatic and manual modes of control. Full compatibility with all types of fans using voltage control. With a maximum of 10 Watts per channel, the Sentry 2 will support almost all high end fans. Tuned accuracy with only a tolerance of one degree. Sound alarm to alert when the temperature is over. Stored settings, the Sentry keeps your settings even after power off.