WORCESTER DT20RF RADIO FREQUENCY DIGITAL ROOM THERMOSTAT (7716192054)

DT20RF digital RF thermostat with twin channel programmer (MK 2)
The DT20RF controls the times and temperatures of your heating and hot water. You can set 3 different time periods per day for your central heating and these can be different on each day of the week. You can choose your target room temperature which will be the same for all time periods. There are 2 parts to this control - a transmitter and receiver. They use radio frequency (RF) to communicate which means there is no additional wiring required to install them. The timer/receiver plugs into the boiler and is automatically activated by the wall mounted room thermostat/transmitter. The DT20RF also features a 'holiday function'. This allows you suspend your normal heating and hot water times for the duration of your holiday and resume them on your return.