Knob black three-speed switch for three-speed fan coil control, by changing the three-speed fan, adjust the size of air supply, and then to adjust the indoor temperature. This product elegant style, performance, stability, and feel good, can withstand high power loads, with a high price. Air Conditioning Equipment Co., Ltd. Hebei Hai Tong is one based on intelligent temperature control technology, scientific research and development, equipment manufacturing, sales and service in one of the high-tech enterprises. Key products include central air-conditioning thermostat, electric valve, control valve, three-speed switch, auxiliary heating, electric air valve, air and so on. Product variety, supporting strong, can provide users with complete technical support and personalized solutions to the many air-conditioning manufacturers, engineering companies, agents and distributors the best choice. 
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