The ESI 2 Channel Multi Purpose Programmer for Central Heating is a programmable thermostat with a 7-day schedule, suitable for controlling central heating radiators. Made of plastic and wall-mounted, this white rectangular-shaped device requires 2 AA batteries and operates on a voltage of 230V. It features temperature sensor technology, auto system switching, and a manufacturer warranty of 3 years. Perfect for efficiently managing your central heating system, this programmable device offers convenience and energy savings.