Spuda Electronic Technology Co.,Ltd. is a professional company specialized in Car GPS/GPRS Tracking System. And we can design and develop functions special for you. We have a professional development team. 1. We can add functions in hardware special for you. 2. We can delevop a software for you too. 3. The total development time is about 1 month to 4 months. Any more questions, please send email to spuda2010@163.com. or we can chat on MSN iris.spuda@hotmail.com, or skype iris.spuda