1. It is a thermostat designed to on / off control the fans and valves in air conditioner applications via comparison of the room temperature and setting temperature to achieve the aim of comfort and saving energy. 2. This thermostat is water heating system of actuator control. 3. Large LCD display with negative black backlight, easy to read, even in the dark. 4. Modern design similar as a cellphone. 5. Beautiful frame CHROME creates elegant life. 6. Acrylic lens to avoid the finger scratch. 7. Touch Button makes simple operation. 8. Four periods program schedules maximize comfort and economy. 9. One-touch temperature control overrides program schedule at any time. 10. Precise comfort control keeps temperature within 1 Celsius Degree of the level you set. 11. Data memory when power is off. 12. Easy installation, suitable for 86mm hidden box and European 60mm round box.Specification: General Model BHT-2001 Material ABS, PC Display 6.6*5cm Indoor Temperature Range 5-35 Degree Celsius Temperature Accuracy +-1 Degree Celsius Time Error <1% Operating Temperature 0 - 45 Degree Celsius Storage Temperature -5 - 55 Degree Celsius Power Supply 220V AC 50-60Hz Current 3A load max Power Consumption <1.5W Size 86*86*13.3mm Weight 167g Package Include Package Contents 1 x User Manual 1 x Thermostat 1 x Screw Set Package Weight One Package Weight 0.24kgs / 0.52lb One Package Size 11cm * 9cm * 6cm / 4.33inch * 3.54inch * 2.36inch Qty per Carton 100 Carton Weight 24.00kgs / 52.91lb Carton Size 46cm * 47cm * 32cm / 18.11inch * 18.5inch * 12.6inch Loading Container 20GP: 385 cartons * 100 pcs = 38500 pcs40HQ: 894 cartons * 100 pcs = 89400 pcs