HT-CS08 is a elegant modern design colorful smart thermostat  for optimal indoor temperature control at gas boiler, air to water heat pump, air to ground heat pump underfloor control system. WiFi Remote Control  4inch Color Touch Display      Manual & PRG mode  Heat(Winter) & Cold (Summer) Mode  Water Heating System (3A)      7 days Programmable (6 periods/day) Anti-frost Protection  Child Lock  External Sensor (Optional) Zigbee Function (Optional) Customized User Interface (Optional) CE, ROHS certificate