Installation is simple: unscrew the adapter, put it into the valve, then tighten the adapter, and tighten the temperature controller on the adapter. A of modes are available: boost mode, comfort mode, vacation mode, automatic mode, power saving mode for . With a low battery alarm function, it will remind you when the battery runs out, don't worry about the sudden power failure that will interfere with the use. Automatic mode: 5+2, 6+1, , and 6 cycles of work can be . After selecting, press the key to enter the setting of the first period of the working day, and press the key again to set the remaining temperature to complete the setting. After connecting to the ZigBee gateway APP, the temperature can be adjusted through the mobile phone, which is smart and convenient. Technical specifications: Control accuracy: 0.5 Celsius Temperature sensor: NTC (10k) 1% Working environment temperature: 0~50 Celsius Default temperature range setting: 5~35 Celsius Display temperature range: 1~70 Celsius Thread size: M30*1.5mm Battery: 2*AA battery power supply (without battery) Maximum path: 4.5mm Colour:White Material:ABS Package Contents: 1 * Temperature Controller Only the above package content, other products are not included. Note: Light 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.