Specs:

1. 1 antenna for mobile network connection.
2. USART and RS-232 interface.
3. Module dimension : 50mm by 49mm
4. Weight : 38g
5. Supply requirement : 4.5V to 5.2V at least 1A
6. 1 SIM card slot

The control interface of each pin description:

GND - GND
RXD, UART receive TTL level, do not connect to the RS-232 level
TXD, UART transmit TTL level, do not connect to the RS-232 level
RST - Reset, active low when the module and 5V TTL
VCC_MCU when the module and 5V TTL level communication, this pin is connected to DC 5V; when the level of communication of module and 3.3V TTL, this pin is connected to DC 3.3V.
VCC5----DC 5V input.
VCC4------DC3.5--4.5 input

Package Included:

1 x Mobile module
1x Power Cable
1x Antenna