Shenzhen Dajin Technology Co. Ltd. is a subsidiary of Shenzhen Fcar Technology Shares Co.,Ltd., specialized in developing and producing automotive car accessories with QQr brand, including TPMS diagnostic tool, TPMS programmable sensor, Car and Truck aftermarket TPMS kit,Auto Diagnostic Scanner for cars, trucks and commercial vehicles, Fleet Management Products and LCD dashboard.

Dajin Tech website