Features 1、Powered by battery, do not need plug, easy to install. (Battery Not Included) 2、Mobilephone App remote control from anywhere, anytime 3、Simply give a voice command to Alexa or Google Home to control your devices. 4、Three modes optional: manual mode, program mode, temporary program mode. 5、Weekly Programmable: 5+2, 6+1, 7 days a week, 6 time slots on weekdays, 2 time slots on rest days, support different temperature setting and run in schedule. 6、With dormant switch, when open, the thermostat can not be controlled by the app during its sleep time. 7、Precise temperature control, more comfortable. 8、Temperature calibration: display room temperature can be calibrate from -9.9°C to 9.9°C 9、AntiFrost function: if the Water Gas Boiler is not turned on for a long time, the thermostat will automatically turn on for a short time. 10、Children lock function is designed to prevents children from operating by mistake. 11、Group control and family share function, control the device together with your family member. Specification APP: SmartLife/Tuya VoiceControl: Amazon Alexa, Google Protocol: 2.4G Wi-Fi Temperature sensor: NTC Temperature accuracy: ±1°C Temperature lag: 0.5~10°C Temperature correction: 0.1°C Minimum temperature setting: 0.5°C Temperature upper and lower limits: 15~95°C Self consumption:<170uW Load current: 3A (negative) Protections level: IP20 Main color: white Main material: ABS Battery: 3 * AA battery (Not Included) Item size: 86 * 86 * 28mm / 3.4 * 3.4 * 1.1in Package size: 100 * 95 * 65mm / 3.9 * 3.7 * 2.6in Package weight: 263g / 9.3ounce   Package List 1 * Temperature Controller Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store