This is a Smart Opentherm thermostat for boiler or thermal actuator heating control system in each single room. Build-in sensors in your  wireless room thermostat detects when the temperature falls to a chosen level and then feedback to the heating system to turn on.  Item No.: WT-25 Programmability: 7days programmable 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, WiFi optional, Zigbee optional Cetificate: CE, ROHS, UKCA, REACH, RED

This energy efficient thermostat is for underfloor heating temperature control and combi  boiler heating control. The LCD is available in black and white option. And smart phone remote control and alexa echo control. 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

It's a wireless smart thermostat with Open Window Detect function. It means open window mode is enabled in the parameter setting, the system will automatically stop heating when thermostat detects a sudden drop of room temperature (2°C in 15 minutes as default). This is normally caused when a window or door is opened without turning off the heating device.  Item No.: WT-15 Programmability: 7days programmable Mode: Heating and cooling mode (Default heating mode)  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, WiFi optional, Zigbee optional Cetificate: CE, ROHS, UKCA, REACH, RED