Shuangtu T-series products are the first on-board vehicles used GPS positioning and intercom system in China, the terminal device is national wireless intercom system which is based on CDMA, GSM or GPRS internet, there is no distance restrictions, and the products can be used for communication with each other by many people at the same time. The tone quality is good, the voice is clear, and the transmitting of voice is quite fast, you can communicate immediately. Besides, it is economical and practical, no roaming fees exist in nationwide intercom，there is no extra calling cost. The capacity of users is very big, it can be communicated in any divided groups, it is convenient and quick, and it can realize the communication of information in one national range easily. The call has no any radiation, and it has no harm to human body. The series products can be installed in the vehicles, ships and other traffic tools, and be supplied the electricity power directly used the power source in the traffic tolls. The installation of the device is easy, all of the antennas are gathered inside of the device, and the operation is also very easy. It is mainly used for contacting, conducting and dispatching the members, in order to improving the communication efficiency and the high-speed reaction ability of treating the emergencies.
The products can be used for buses, passenger buses, taxi, logistics and dangerous goods transporting vehicles, automobile clubs, official cars, special industry vehicles and ships, etc.