Easy to install, and 2 screws are included. No need any special installed tools, but please cut off the power source before installing Convenient to control the system with ON/OFF switch on the left side of thermostat, and easy to adjust the temperature with 10~30 temperature switch Made of high-quality plastic material, environmental-friendly, safe, durable to use Suitable for using to control the central air-condition in hotel, restaurant, supermarket or home, the operating principle is to control the ON/OFF of valve and fan in the fan coil Package Included: 1 x Mechanical Thermostat & 2 x Screws