This is a Arduino GPS/GPRS/GSM shield from DFRobot. This shield with a

Quad-band GSM/GPRS engine works on frequencies EGSM 900MHz/DCS

1800MHz and GSM850 MHz/PCS 1900MHz. It also supports GPS

technology for satellite navigation. It's possible for your robot and control

system to send messages and use the GSM network.

 It is controlled via AT commands (GSM07.07 ,07.05 and SIMCOM

enhanced AT Commands). And the design of this shield allows you to drive

the GSM & GPS function directly with the computer and the Arduino Board.

It includes a high-gain SMD antenna for GPS and a flexible GSM antenna

8.5cm ( U.FL connector ).

 This GPS/GPRS/GSM shield uses an embedded SIM908 chip from SIMCom.

Featuring an industry-standard interface and GPS function, the combination

of both technologies allows items, vehicles and people to be tracked

seamlessly at any location and anytime with signal coverage. 

SPECIFICATION

Power supply: 6-12v

Low power consumption (100mA@7v - GSM mode)

Quad-Band 850/900/18001900MHz

GPRS multi-slot class 10

GPRS mobile station class B

Compliant to GSM phase 2/2+

Class 4 (2 W @ 850/900 MHz)

Class 1 (1 W @ 1800/1900MHz)

Control via AT commands(GSM07.07 ,07.05 and SIMCOM enhanced AT Commands)

Support GPS technology for satellite navigation

Embeded high-gain SMD antennas for GPS & GSM

Directly support 4*4 button pad

USB/Arduino control switch

Programmable switch for Arduino

LED indicators for power supply, network states and working status

Board Surface:Immersion Gold