Established in 2007,Sinocastel is a national high-tech manufacturer integrating R&D, production, sales & operation, focusing on the research and production of GPS telematics and solutions. Our main products include: OBD tracker, GPS/ Beidou trackers for all kinds of vehicles, hardwired GPS tracker, asset GPS tracker,T-BOX, children & elderly smart watch and GPS tracker, pet GPS tracker,which have one or more communication modes such as Bluetooth, GSM, CDMA, WCDMA, and LTE. The hardwares and ...View More