Customise your 7 day heating schedule faster than ever before with the BT21 app. Connect via bluetooth and control all of your thermostat settings quickly and easily. Once you've set up one thermostat, copy and paste all of your settings to another thermostat with easy presets. - Quick and easy heating schedule. - Copy presets to multiple thermostats. - View temperature data for the last 7 hours. - View %heating time for the last 7 days. - Send remote technical reports. - Manage temperature l