The E-TOP WT-11 is a next-generation wireless programmable smart heating thermostat for boiler systems, sporting a refreshed modern upright casing and a highly intuitive user interface. This premium wireless thermostat provide convenience to control heating system remotely for room temperature, creating an exceptional balance between premium aesthetics and high-performance trade reliability for regional plumbing merchants and commercial installers. Item No.: WT-11 Programmability: 7days programmable schedule (5+1+1 / 5+2 options) Mode: Heating and cooling mode (Default heating mode) Backlight: Premium High-Contrast White Material: Fire-Retardant 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 certified; ISO 9001/14001 factory Switching Relay: 3A Potential-Free (Volt-Free Dry Contact)