Note: The serial port numbers of all modules are not unique or fixed, when you have
our device in your hand, our sales manager will inform you the serial port of the
peripheral module (GPS, scanner, RFID etc.) for your redevelopment.
7. Service and Technical Support
Service Tel:
+86-010-62984250 Mr. Ji, Ms. Wei
Technical Support Tel:
+86-13522109451 Mr. Tian
+86-18601212948 Mr. Wu