Power supply:DC 5V 1A or more than 1A. Communication interface:a TTL level serial port, compatible with 5V 3.3V microcontroller; a USB interface, can be directly connected to the computer debugging. GPS antenna interface:a IPXmini antenna interface, the default connection active GPS antenna. GMS antenna interface:a IPXmini antenna interface, default to provide PCB antenna. interface:drawer type interface. USB interface:mini USB interface. Voice microphone interface: lead out, the interface is a 2.54 * 4P single-row pin form. Other interfaces:a group of IIC interface, a group can control the module interface (module default self-start). Indicator lights:a 0603 LED, used to indicate the module's working status, a 0603 LED, used to indicate the module's network status Colour:As Shown Material:PCB Package Contents: 1 * SIM5320E 3G GSM GPRS GPS development board kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.