Battery operated and included - Uniform equipment compatible with dry contact switching (Normally open & Normally closed) - LCD Digital temperature display shows current or set temperature - Simple installation and functionality - Icons for heating call & low battery The Taco 568 is an extremely versatile digital thermostat. It is battery operated, with dry contact switching and is compatible with most types of hot water heating systems. It can operate conventional heating systems that require a contact closure when room temperature is below set temperature. It can also operate some failsafe systems that require a contact closure when room temperature is above set temperature.