CCT-28-X Wireless Hub Controllers is used in water underfloor heating system. As a central control unit, it can control boiler (via "dry contact"),circulating pump,normally closed electric thermal actuators(servos) and wireless thermostats. According to user's set temperature, hub controller can control to open or close boiler, circulating pump and electric actuators, to achieve the purpose of comfort and energy consumption saving. Up to 8pcs wireless thermostats can be connected to 1pcs CCT-28-X. Up to 8 electrothermal actuators can be connected to each zone. CCT-28-X Parameter Power supply:220V Current Max: 20mA Radio Frequency:433MHZ Wireless Distance:30m(indoor);200m(outdoor) Max. Power of Pump:1000w Pump Output delay:5min Power outage recovery time:Max 30min Control objects 1. Boiler via Dry Contact(gas boiler,electric boiler,Pellet boilers, etc) 2. Pump 3. Normall Closed Actuators 4. Wireless Thermostats ATT: The max. number of thermostats can be controlled:8pcs The maximum number of actuators can be connected to each terminal:8pcs Wireless Thermostats 1. BOT-R6X-WIFI- 2. BOT-R7X-WIFI- ... ps: = No Receiver, it means that the product does not contain the receiver (CCT-28-X is a big receiver) Wireless Thermostats Parameter: Power Supply: 3x1.5V AA batteries / USB Type C Temperature Range: 5-95 Temperature accuracy: +-0.5 Sensor: Built-in Air Sensor APP Control: Tuya Smart/Smart Life Voice Control: , , Alexa Programmable: 5+2/6+1/ mode (6 periods on weekdays and 2 periods on holidays) Material:ABS+PC Package Contents: 1 * Smart temperature controller