Features:  1.Smart Tuya ZB Radiator Thermostat:The radiator thermostat is with LCD digital display screen. It is with three sections of AA batteries,which is a special valve using cooperatively with heating radiator.Artificially set indoor temperature, mainly used in the floor heating system to control the closing and opening of the pipe . 2. A Tuya ZB Wireless Gateway Hub is a Must to work with: A ZB wireless hub is a must that connects to the valve ,as well as a variety of ZB smart products, which is proved to be the bridge and control center for smart homes,which plays an irreplaceable role for all ZB products and realizes the whole linkage of your house,a really good substitution for unstable WiFi network.  3.Programmable Schedule with Weekly Programming Selection:Supports manual set up 5+2,6+1 and 7 days weekly schedule for option,providing you with the maximum convenience for different situation and setting customized schedule for your house temperature.  4.Voice and Remote Control for the Tuya ZB Wireless Gateway:Supports App remote control via your smart phone,together with the hands-free voice control via Alexa and Google Assistant after successfully connecting your valve to 'Smart Life 'App on the basis of one Tuya ZB Wireless Gateway.  5.Open Window Detection:When room temperature suddenly drop into temp. threshold,valve will close for 15 minutes.After that,if the room temp. is still lower than temp. Threshold,it will keep this mode.Besides,it's easy to read digital display with Celsius temperature.  6. Type :1 pcs Wireless Gateway HUB+3pcs Valve Controller.    Parameter:    Power: 3*2 AA* 1.5V alkaline batteries(Not Included);  Maximum current: 90mA;  Working temperature: -10~60°C;  Display accuracy: 0.5℃;  Default range of temperature adjustment: 5~35°C;  Probe sensor: NTC(10k)1%;  Range of temperature display: 0~70°C;  Thread size: M30*1.5;  Insulating condition: Normal environment;  Size(mm): 66*52*82+20mm;  Running program: Set per 1 week as a cycle;  Maximum route: 4.5mm;     Package included:  1 x Wireless Gateway HUB,  3 x Radiator Thermostat Valve Controller,  1 x Bag of Accessory,  1 x User Manual