Shenzhen Criller Technology Co., Ltd. is a professional supplier of Electronics product . Criller Electronics (HK) Co.,Ltd. is the Branch Company resisted in Hongkong . We are committed to providing high-quality and advanced electronic components and scientific solutions. We manufacture and market GPS trackers ,GPS antennas, GSM/GPRS antennas, GSM/GPRS modules, GPS modules, GPS navigators, GSM/GPRS modems ,GPS receivers,GSM Alarm system and PCBs. We have management personnel with rich ...