Item Type: Smart Thermostatic Radiator Valve Material: Flame retardant PC Intelligent Thermostatic Radiator Valve (TRV): 4 x AA batteries, 2 batteries per radiator valve (shipped without batteries) Display: 2 x AAA batteries (shipped without batteries) Control Mode: For Smart life, for RM App, for Google Home Connection Protocol: For ZigBee, WIFI Display Accuracy: 0.5 Backlight: White Probe Sensor: NTC (10k) 1% Limit Adjustment Temperature Range: 1-70 Default Temperature Adjustment Range: 5-35 Temperature Display Range: 1-70 Operating Ambient Temperature: -10-60 Insulation Conditions: Normal Environment (0-50) Thread Size: M30 x 1.5mm (TRV) Maximum Route: 4.5mm (TRV) Operation Program: Set up every 1 week Package List 2 x Smart Thermostatic Radiator Valve 1 x Display Screen 10 x Accessory 2 x Screw 2 x Nut 1 x Instruction 1Programmable: The thermostatic valve supports manual setting of a weekly schedule with 4 periods per day, providing you with maximum convenience for different situations. 2Energy Saving: Users set the upper and lower temperature limits in the APP, when the temperature reaches the threshold, it will stop the operation of the device, and when the temperature is detected to plummet, it will stop heating. 3Rotatable Screen: The temperature control valve has a rotatable screen that allows you to read it from different angles, providing a more comfortable user experience. 4Remote Control: Users can control the temperature of your house in real time anytime and anywhere through for Smart life, for Smart RM app. 5Widely Used: Temperature control valve can be connected with other devices through wireless internet, suitable for residential, shopping mall, hotel heating temperature control, etc.