The ESRTP4+ is a simple to install, 7-day, 5/2-day, or 24-hour wired programmable room thermostat. It is suitable for controlling combi boilers, system boilers, or heat-only boilers. The controller is designed for ease of use and includes features to help save gas and lower energy bills. It boasts a large, easy-to-read LCD with a backlight and supports optimum start, delayed start, and TPI technology. The unit automatically adjusts for British Summer Time and Greenwich Mean Time. It comes with a factory-set clock and date, a pre-set program with override options, and an optional landlord service safety feature. It also includes a holiday mode and a 3-year warranty. The total switch rating is 8(2)A at 230 Volts. Installation requires a live feed and should be performed by a qualified or competent person.