Serial Development Board Support RS232/mirco USB

This product uses industry-grade materials and is a PCIE-to-serial USB 2.0 multi-function development board. There are nine-pin serial port and USB 2.0 interface for customer debugging. And it comes with a self-elastic SIM card and requires an external 5V external power supply. The built-in card holder of the development board will not conflict with the SIM card holder of the device motherboard, and customers can choose according to their needs.