Siemens Wireless Modules.- Build in 16 GPRS modem in one box- Sigle power supply for 16 modems- Power button to control on and off - USB interface- Dual Band: 900/1800MhzTri Band: 850/1800/1900MHz, or 900/1800/1900MhzQuad 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 communicatonGPRS Function:- GPRS multi-slot class 10- 21.4kbps uplink / 85.6 kbps downlink- 42.8 kbps uplink / 68.2 kbps downlink- GPRS mobile station class B- Full PBCCH supportSMS Function:- Support AT command- Text and PDU- Point-to-point (MT/MO)- SMS broadcastVoice Function:- Voice Call through mobile network- Auto answer function- Full duplex and half duplex rate- Enhanced full rate (EFR)- Double sound multi- frequencies function (DTMF)- Basic handsfree operation- Echo cancellation- Noise reductionData- CSD up to 18.8 kbps- Auto answer function- USSD- Non transparent mode- V.82bis compression- V.110Accessories- USB cable- GPRS Modem Pool main unit - Power Cable- SMA Antenna x16- Manual CD