Tuya Zigbee 3.0 Thermostat Radiator Valve Smart TRV Programmable Temperature Controller for Alexa Go [Programmable Schedule ]Supports manual set up 5+2,6+1 and 7 days weekly schedule with 6 periods for option ,providing you with the maximum convenience for different situation and setting customized schedule for your house temperature.Holiday mode,automatic mode,boost mode available.Choose workday and restday mode to meet your own mind. [Voice and Remote Control ]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 Tuya /Smart Life App on the basis of one Tuya ZigBee Wireless Gateway. [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. Parameter: Power Supply: 2*2 AA* 1.5V alkaline batteries(without battery) Maximum current: 90mA Working environment temperature: -10~70°C Display accuracy: 0.5℃ Default range of temperature adjustment: 5~35°C Probe sensor: NTC(10k)1% Range of temperature display: 1~70°C Thread size: M30*1.5 Insulating condition: Normal environment Running program: Set per 1 week as a cycle Maximum route: 4.5mm Colour:White Material:PC Size: 94 x 56mm Package Contents: 1 x Thermostat Radiator Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.