Unilateral and comprehensive. According to the product information of electric heaters produced and promoted by Xue Zhongqing brand, single control and full control on electric heaters mean unilateral control and full control of the functions of electric heaters respectively. The Xuezhongqing brand was founded in 2002 and is committed to the research and development, design, manufacturing and sales of electric heaters. It is an industrial manufacturing base for the production of finished electric heating tables and the processing and production of auxiliary semi-finished products.