Wired Thermostat: Wall mounted with a simple 2 wire connection to the boiler and powered by 2 x AA batteries, a direct replacement for older 2 wire mechanical dial room thermostats Central Heating Controller: Works with gas combi boilers, oil boilers and heat pumps, with schedules to match your routine and a lock to prevent unwanted adjustments Flexible Heating Schedules: Create daily or weekly heating plans with six time and temperature change points available for every day of the week Accurate Temperature Control: Built in control algorithms hold the room closer to the set temperature than a mechanical dial thermostat Backed By ENGO: Telephone and email support, installation video guides and a 5 year manufacturer warranty