ChangSha Circle Technology Co., Ltd. is an enterprise specialized in the professional research and development of auto fittings. After several years efforts. The company has launched a series of supported products for automobiles. Such as the electronic regulator with short-circuit protection and KDL auto-control horn.

The KDL auto-control horn, the research findings with eight years efforts of the company, absolutely solves the pendent technical problems of non-waterproofness, contact burning, and short service lift, which has been puzzling the contact-type automobile horn over a long period of time. The unique features of product such as waterproof functions, multiple protective circuit, special techniques, as well as ultra-thin figuration, practicability and serviceability be regarded as the leading position among the counterparts, and the second to none in the world at present.

The product has been awarded as the national patent, and has passed the sampling inspection conducted by the national technological supervisory department; Its technical indices all satisfy or exceed the national technical standards.