This is a wired digital programmable thermostat, which comply to your boiler. With a large LCD display, you can read the room temprature anytime, and to preset the schedule for everday.  Item No.: HT-11 Programmability: 7days programmable Backlight: White Mode: Heating and cooling mode(Default heating mode)  Material:  ABS+PC Packing : Netural White Box, OEM acceptable Other function: Child lock, Open window detection, Frost protection, Temp. calibration Optional: Opentherm protocol  Cetificate: CE, ROHS, UKCA, REACH