The battery thermostat is ideal to control the temperature of your household by control the boiler heating, and is very easy to use. Allows for the operation of heating / cooling equipment, when the temperature of the environment to be monitored is lower/higher than a user-preset reference temperature. Simplified installation steps with power supply by battery.  Item No.: HT-02 Programmability: 7days programmable 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