Features 1、Small design, do not occupy lots of space, avoiding collisions with human bodies or objects. 2、Control the radiator thermostatic valves anytime and anywhere through the mobile phone app. 3、Deeply customize the temperature according to your specific needs, and set the time and temperature more accurately. Support one week programming(5+2/6+1/7 days), set temperature for 6 time periods per day. 4、Compatible with amazon alexa and home, a simply command to voice control the TRV. 5、Window opening function, when the window is opened and consequently the room temperature decreases by more than 6℃ in 4min, the main screen will display /"OP/" and the valves will be turned off. If the room temperature increases by 3℃ this function may be disabled or it will be disabled after 48min or manually. Specification Thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator to control the temperature of a room by changing the flow of hot water to the radiator. With the TRV TV06 you can conveniently adjust the room temperature between 5-30℃, and save more than 15% of energy. Features: Small design, do not occupy lots of space, avoiding collisions with human bodies or objects. Control the radiator thermostatic valves anytime and anywhere through the mobile phone app. Deeply customize the temperature according to your specific needs, and set the time and temperature more accurately. Support one week programming(5+2/6+1/7 days), set temperature for 6 time periods per day. Compatible with amazon alexa and home, a simply command to voice control the TRV. Window opening function, when the window is opened and consequently the room temperature decreases by more than 6℃ in 4min, the main screen will display "OP" and the valves will be turned off. If the room temperature increases by 3℃ this function may be disabled or it will be disabled after 48min or manually. Child lock function avoids kid's operation on it. Specifications: Type: Zigbee / WiFi / BT (Optional) Material: ABS Color: White Battery: 2 * AA battery (Not included) Thread Size: Compatible with RAVL/RAV/RA valve Display: LED Maximum Radiated Power: 10dBm Max. Route Size: 4.5mm APP: Smart Life Degree of conservation: IP20 Temperature Range: 5-30℃/ 41-86℉, step: 0.5℃/32.9℉ Working Mode: Auto mode, Manual mode, Holiday mode Item Size: 100 * 56.5 * 56.5mm / 3.93 * 2.22 * 2.22in Item Weight: 146g / 5.15oz Package Weight: 283g / 9.98oz Package Size: 12 * 8 * 8cm / 4.72 * 3.15 * 3.15in Package List: 1 * Temperature Controller 3 * Mounting Connections (RAVL/RAV/RA valve) 1 * User Manual (English + German) Package List 1 * Temperature Controller 3 * Mounting Connections (RAVL/RAV/RA valve) 1 * User Manual (English + German)