The ESRTP4RF is a 7 day, 5/2 or 24 hour wireless programmable room thermostat. This removes the need for any fixed wiring between the thermostat and boiler reducing the installation time and eliminates the chance of damaging the aesthetics of the property, with no redecorating or making good required afterwards. The ESRTP4RF is one of the easiest to use on the market, providing 4 or 6 time and temperature events each day. The 7 day, 5/2 or 24 hour programming options meets most homeowners requirements. The ESRTP4RF comes pre-paired and has two-way RF communication at 868MHz radio frequency band to ensures a more accurate, stronger and quicker response compared to older styles and allows for a signal strength indicator. The ESRTP4RF can provide wireless automatic time and temperature control to heating or cooling systems in domestic and light commercial buildings. It can be used to control the heating circuit in a S or Y Plan and is particularly well suited to control combination boiler installations or additional zones in a S Plan Plus system. The new range of programmable room thermostats hold a 3 year guarantee for consumer and installer peace of mind and are focused on value, quality and simplicity, offering an economical and durable solution for households. Boiler Plus compliant Opentherm communication Large, easy to read LCD with back light Optimum stop, delayed & optimum start/ TPI technology 7 day, 5/2 day or 24 hour programming options Select either 4 or 6 time & temperature events Automatic BST/GMT 1 hour time change Factory set clock and date Pre-set built in programme & easy to use overrides Two way communication Includes optional landlord service safety feature Holiday mode http://www.esicontrols.co.uk/esrtp4rf-.html