The R&D team of Nyitech collected more than 18 experts who worked in OBD&GPS industries over than 10 years. If you are just looking for a professional OEM and ODM service. Nyitech is your right choice. We can customize your need such as: Dongle with OBD function w/o GPS, Dongle with GPS w/o OBD. Our product support various communication frequency like 2G/3G/BT/RS232/TTL. We also can develop dedicated protocol for dedicated vehicle. And we provide hardware, packing customization service either.