1. Smart thermostat that can be controlled by mobile phone before going home. 2. Wall mounted or desktop mounted installation can meet your different needs. 3. Match the temperature controller with the receiver, and the receiver can be heated, making it more flexible to use. 4. 2 Power supply modes:2 x AAA battery (not included), USB DC 5v charging, AC230v wiring. 5. Create a thermostat group for centralized control and device sharing support. Compatible with for Alexa and for Google Assistant for hands-free voice control. Six time periods can be set every day, and manual mode or automatic mode can be freely . The backlight LCD screen is easy to read, and the touch button makes the operation simple. The keyboard locking function is designed to prevent children from misoperation. It has antifreeze function to extend the service life of the equipment. Accuracy, Accuracy keeps the temperature at the level you set. Voltage:230v Charging current:3A Temperature sensor:ntc Temperature accuracy:1 1 Temperature regulation range:590 90 Protection grade:ip20 Wireless transmission distance:100-200m Radio frequency:868mhz App:Graffiti Power supply:2xAAA batteries(not included), 5v usb dc charging, ac230v wiring Colour:White Material:Plastic Size:Temperature controller:135x87.5x23.2mm or 5.3x3.4x0.9in Receiver:86x86x26mm or 3.4x3.4x1.0in Package Contents: 1 x Intelligent temperature controller 1 x Receiver 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.