GSM-GPRS MODULE   is an ultra compact and reliable wireless module. It is based on SIM900 4 Frequency GPRS module. The GSM-GPRS Shield is configured and controlled via its UART using simple AT commands.  

Module have  two set power supply interface VCC5 5V power supply, VCC4 interface, 3.5--4.5V power supply, optional power on self starting (default) and control start.

The MODULE  allows you to achieve this via any of the three methods:  Short Message Service, Audio and GPRS

Features

• Fully compatible with Arduino uno and Mega.
• calling and message .
• SIM900 all pins breakout. Not just the UART port and debug port be layout.
• Not only can use the button for power on , but also can use the digital pin of Arduino to power on and reset the SIM900 module.
• Quad-Band 850/ 900/ 1800/ 1900 MHz
• Control via AT commands 
• Supply voltage range : 3.7 … 5 V
• Size:    49mm x 47mm

 Package Includes

1. GSM-GPRS Module V3.1 
2. Quad band Antenna
3. POWER CABLE