Item Type: Intelligent Thermostatic Radiator Valve Material: Flame Retardant PC Intelligent Thermostatic Radiator Valve: 2 x AA Batteries (Shipping Without Batteries) Display: 2 x AAA Batteries (Shipping Without Batteries) Control Mode: Application, Voice Connection Protocol: For ZigBee, Wireless Net Display Accuracy: 0.5C Backlight: White Probe Sensor: NTC (10k) 1% Limit Adjustment Temperature Range: 1-70C Default Temperature Adjustment Range: 5-35C Temperature Display Range: 1-70C Operating Ambient Temperature: -10-60C Insulation Conditions: Normal Environment (0-50C) Thread Size: M30 x 1.5mm (TRV), Approx. 1.5mm / 0.06in Maximum Route: 4.5mm (TRV), Approx. 4.5mm / 0.18in Operation Program: Set Every 1 Week Package List 1 x Intelligent Thermostat Radiator Valve 1 x Display Screen 5 x Accessories 1 x Screw 1 x Nut 1 x Instruction Manual 1APP Remote Control: Smart thermostatic radiator valve can be controlled remotely via APP, such as for Smart Life and so on, using simple voice commands for house temperature control for a more convenient experience. 2Easy Adjustment: Smart thermostatic radiator valve connects to wifi to easily adjust the temperature, calibrate the temperature, set the time, or program for 7 days. 3Programmable Schedule: The thermostatic radiator valve supports manual setting of weekly schedule, 4 time slots per day, and setting custom schedule for your house temperature. Automatic mode, manual mode and on off mode. 4Open Window Stop Function: Set the upper and lower temperature limits in the APP, when the temperature reaches the threshold it will stop the device, when it detects a sudden drop in temperature (suspected open window), the control chip of the electric heater will stop heating, very smart. 5LED Dot Matrices Display: TRV controller, rotatable screen, easy installation, space saving, clear display, beautiful appearance, suitable for residential, shopping market, hotels heating temperature control, etc.