Masterplug TEIH7 24 Hour/7 Day Programmable Electronic Timer for Immersion Heater.
The timer hard wires into place using two push out connection points on the back of the unit. It is ideal for controlling immersion heaters, ensuring that you get hot water when you want it. It will save energy for you as well as ensuring you have a convenient supply of hot water.
It has an LED neon indicator that lights up when immersion heater is ON. It has 10 ON/OFF programs with a 1 minute step. It has Manual ON, Auto and Manual OFF selections for manual over-ride when required. It has 12 and 24 hour mode selection and a British Summer Time function for when the clocks change.
Inside the timer there is a rechargeable backup battery that charges through the timer mains connection. The battery ensures that in the event of power cuts you do not have to reset the timer.