HIGH QUALITYOur room thermostat is made of high quality plastic material, so this mechanical temperature controller is eco-friendly, safe and durable to use.You can buy our thermostat switch with confidence . EASY TO USEOur room thermostat is convenient to control the system with an ON/OFF switch on the left side of the thermostat, and your room temperature is easy to adjust with the temperature switch 10~30. APPLICABLE PLACEOur mechanical thermostat is suitable for use to control central air conditioning in hotel, restaurant, supermarket or home.The working principle of our room thermostat is to control the ON/OFF of valve and fan in the fan coil unit. White color Size: 8.8 x 8.8 x 5 cm Quantity sold: 1 piece Type of control: Temperature Control mode: mechanical temperature controller Measurement object: room Temperature range: 10-30 () Temperature measurement error: 1 () Installation type: wall Output signal: 10 (mA) Operating voltage: 220 (V) About chromatic aberration: The goods sold are all taken in kind, but due to different lighting, monitors , etc., there will be a little color difference, which is a normal phenomenon, not a quality problem! About the size: The dimensions of the products sold are all measured manually. Due to different measurement methods and tools, there may be an error of 1-2mm, which is normal!