Features: Smart thermostat that can be controlled by your phone before coming home. Wall mount or installation style tabletop meets your different needs. Pairing the thermostat with the receiver, then the receiver can apply heating, more flexible to use. 2 mothods Power supply: 2 AAA batteries (not included), DC 5V USB charging, AC230V wiring. Create a thermostat group for centralized control and support device sharing. Color: white Voltage: 230V Charging current: 3A Temperature sensor : NTC Temperature accuracy: 1 Temperature adjustment range: 5 ~ 90 Protection level: IP20 Wireless Transmission Distance wire: 100-200m Wireless frequency: 868MHz/ 433MHz (bidirectional FSK) Application: Tuya Power supply : 2 AAA batteries (not included), DC 5V USB charging, AC230V wiring Item size: Thermostat: 135*87.5*23.2mm / 5.3*3.4 * 0.9in Receiver: 86*86*26mm / 3.4*3.4 * 1.0in Package size: 14.0*9.5* 6.7cm / 5.5*3.7 * 2.6in Package weight: 350g / 12.3oz Package list : 1 * Smart Thermostat 1 * Receiver 1 * Installation Screw Set < /p> 1 * USB cable 1 * manual