?Shenzhen Wit Group Technology Co., Ltd. was founded in April 1999. It is specialized in developing and manufac-turing electronic products. It is powerful on economy and science & technology. The central team carried out the relative R&D since 1992. Till now we have gathered we-althy experience on production and management for more than ten years. The main products of our company are motorcycle alarm, automobile alarm, house alarm, parking sensor system and vehicle GPS/GSM tracking and locating alarm system.