This is a wired thermostat which is designed to regulate the temperature in your home by control gas boiler on/off. Programmable wire thermostats allow you to enter an ideal comfort temperature and switch the heating on or off in order to maintain this setpoint temperature. Item No.: HT-25 Programmability: 7 days 4 periods programmable (6 period also avaivable) Mode: Manual Mode, Away Mode, PRG Mode  Color: Black or white  Backlight: White 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