1. Made of high quality plastic material, environmentally friendly, safe, durable 2. Convenient to control the system with on/off switch on the left side of the thermostat, and easy to adjust the temperature with a temperature switch from 10℃~30℃ 3. Easy to install, includes 2 screws. No special tools needed installed, but cut off the power supply before installing 4. Suitable for controlling central air conditioner in hotels, restaurants, supermarkets or homes. The principle of operation is to control the on/off of the valve and fan on the fan coil 5. Package Includes:1 x Mechanical Thermostat and 2 x Screws