Features FOR HOUSEHOLD USE: WiFi smart temperature controller, suitable for home boiler, water heating, and floor heating system, convenient and practical. RECEIVER TRANSMITTER: The thermostat kit includes a receiver and a transmitter, with a wireless open space transmission distance of up to 100 meters. POWER SUPPLY METHOD: The transmitter is powered by 2 AA batteries (not included) or through the Type C interface, making it easy to use at any time. MOBILE REMOTE CONTROL: You can remotely control the device through phone, support voice control, share control with guests and family through for Wyze APP. WALL MOUNT INSTALLATION: The wireless thermostat is for wall mounting installation, and equipped with screws and caps for easy fixation and installation. Specification: Item Type: WiFi Thermostat Model: ME98 Transmitter Power Supply: 2 x AA battery (not included), USB (Type C Port) Receiver Power Voltage: 230V Temperature Sensor: NTC Temperature Accuracy: ±0.5℃ Temperature Range: 0-90℃ Temperature Setting Range: 5-70℃ Environmental Temperature: 0-50℃ Load Current: 3A Wireless Receiver: AC230V, 50/60Hz Wireless Frequency: 433MHZ WiFi Communication Protocol: TCP/IP, MQTT WiFi Frequency: 2.412GHz-2.484GHz Wireless Transmission Distance: Open space 100 meter / 328.1ft Package List: 1 x Thermostat Receiver 1 x Transmitter 2 x User Manual 4 x Screws 2 x Expansion Screw Caps 1 x Power Cord 2 x Accessories Package List 1 x Thermostat Receiver 1 x Transmitter 2 x User Manual 4 x Screws 2 x Expansion Screw Caps 1 x Power Cord 2 x Accessories