Based on Wavecom Q24 plus Wireless Modules. - Build in 64 GPRS modem in one box - Sigle power supply for 64 modems - Power button to control on and off - USB interface - Dual Band: 900/1800MHz Tri Band: 850/1800/1900MHz, or 900/1800/1900Mhz Quad Band EGPRS 850/900/1800/1900 Mhz - Send MMS - GPRS class 10:max 85.6kbps(downlink) - Auto answer function for voice and data collection with the remote device. - AT command to control and program - Designed for WAP, MMS, SMS, CSD data, fax, and voice applications - Support XP/NT/2000/2003/vista operation systems - Design for high traffic communicaton Specifications 1. USB WIRELESS GSM/GPRS MODEN 2. Based on Wavecom and Cinterion Wireless Modules. 3. TCP/IP,OPEN AT. 4. Send and receive data, fax, e-mail, SMS 5. Sending 38,400 SMS per hour 6. USB 2.0 driver 7. 32 SIM card slots 8. Wireless access to internet 9. Comply with GSM Phase 8+ standard 10. Send and receive SMS, MMS, e-mail and data 11. Maximum transmitting speed 115KBps 12. Double tone multi-frequency function(DTMF) 13. Send maximum 38400 SMS per hour