Our thermostat is made of high-quality plastic material, environmental-friendly, safe, durable to use. It is very easy to control the system with the ON/OFF switch on the left side of thermostat and also very convenient to control the temperature by the 10℃~30℃ temperature switch. It is also very easy to install with 2 screws. So it is perfect for using to control the central air-condition in hot, restaurant, supermarket or home etc. Specifications: Condition: New Shell Material: Plastic Color: White Adjustable Temperature: 10℃~30℃ Voltage: 220V 50HZ Max Load Current: 6A Size(Lx H x T): Approx. 8.4 x 8.4 x 3.8cm / 3.3 x 3.3 x 1.5inch Package Weight: Approx. 151g Package Included: 1 x Mechanical Thermostat 2 x Screws Please Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Thermostats are made of high quality plastic, environmentally safe, robust and durable. Flame retardant material, with insulation, flame retardant, robust material, ageing resistance, etc., safe and reliable. Easy control of the system with the on/off switch on the left side of the thermostat, free rotating switch with variable speed. The easiest way to control your heating. No complicated procedures: setting the temperature is simply done via the dial. The temperature can be adjusted very easily with the temperature switch from 10°C to 30°C. Simple algorithms learn how to reach and maintain the room temperature more efficiently. The mechanical thermostat is easy to install and includes 2 screws. It can be installed quickly without special tools, please note that you should disconnect the power supply before installation. Thermostat switches are suitable for controlling central air conditioning in hotels, restaurants, supermarkets or private homes. It works by controlling the opening and closing of valves and fans in fan coil units.