The Drayton RTsi 2400I Room Thermostat is a white, square-shaped device made of plastic, designed for wall-mounting. It operates on electric power with a 3-wire wire configuration and is compatible with central furnace systems. The thermostat features a dial control style and analog/mechanical technology, with a voltage of 230V. This programmable thermostat from the United Kingdom has one period per programmable day, one cool stage, and does not have a battery size listed. Was opened but never fitted Please note no instructions All included is in the pics
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