Shenzhen Welldone Technology and Industry Co., Ltd. of China was found in 1995, is a leading manufacturer and exporter of wireless door phone, wireless intercom system, wireless intercom access control system, and wireless door-releaser in China. We mainly focus on short-range wireless communication products, residential security products, and electronic products. The patent products of wireless door phone and wireless intercom access control system are designed specially for modern residents an... ...[More..]