GSM GPRS Modem

I have created a GSM GPRS modem; Industrial grade SMD components used and it is self powered by USB and can easily plug into PC using th USB cable. Below are the specifications

Specifications: 

1.  Quad Band: 850/900/1800/1900 MHz 

2.  GPRS Multi slot Class: 12, 1~12 configurable 

3.  GPRS Mobile Station: Class B 

4.  Compliant to GSM Phase 2/2+: Class 4 (2W @ 850/ 900 MHz)
                                               Class 1(1W @ 1800/1900MHz) 

5.  Low Power Consumption: 1.3mA @ DRX=5
                                         1.2mA @ DRX=9 

6.  Operating Temperature: -40 °C to +85 °C 

7.  GPRS Class 12: Max. 85.6 kbps (uplink & downlink) 

8.  PBCCH Support 

9.  Coding Schemes: CS 1, 2, 3, 4 

10. CSD: Up to 14.4 kbps 

11. USSD 

12. Non Transparent Mode 

13. Protocols: PPP/ TCP/ UDP/ HTTP/ FTP/ SMTP/ MUX 

14. SMS: Text and PDU Mode 

15. SIM: 3V/1.8V 

16. PC Interface: USB 2.0 

17. Self Powered by USB

This product is listed in eBay also see the below link

http://www.ebay.in/itm/131353044913?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649