Shenzhen Meidasi Technology Co.,Ltd (Hongkong Vstar International Limited) is a manufacturer which is located in Shenzhen, China, specializing in researching, manufacturing and marketing safety alarm systems, GSM wireless alarm systems, Wireless auto dialers, GSM GPS tracking systems, alarm sensors and related accessories. With perfect design, strong manufacturing ability & high quality, we have got RoHS, ISO9000:2000, CE and CCC certificates. After decades of hard work, we have built up a ...   |