The price is different according to different module inside, wavecom or Siemens, up to you. Here below are the models
List for your reference.
Siemens
MC37i dual band 900/1800 MHz, support SMS, MMS, FAX, WEB, OPEN AT
MC52i dual band 900/1800Mhz, support SMS,MMS,FAX,WEB,TCP/IP,OPEN AT
MC55 three-band, 900/1800/1900MHz support SMS,MMS,FAX,WEB,TCP/IP,OPEN AT
MC56 three-band, 850/1800/1900MHz support SMS,MMS,FAX,WEB,TCP/IP,OPEN AT
MC55I quad-band, support SMS, MMS, FAX, WEB, TCP/IP, Open AT
Frequency band
- Dual Band: 900/1800 MHz
Tri Band: 850/1800/1900MHz, or 900/1800/1900Mhz
Quad Band EGPRS 850/900/1800/1900 MHz
Supported Operating Systems: Windows 7/ Windows Vista/ Windows XP/ Windows Server 2003/ Windows 2000/
Windows 98SE/ CE/Linux 2.40/ MAC 9.8X
Specifications
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USB Wireless GSM/GPRS Modem
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Based on Wavecom Wireless Modules.
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TCP/IP, Open AT.
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Send and receive data, fax, E-mail, SMS
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Sending 19200SMS per hour
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USB 2.0 driver
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8SIM card slots
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Wireless access to internet
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Comply with GSM Phase 8+ standard
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Send and receive SMS, MMS, e-mail and data
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Maximum transmitting speed 115KBps
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Input voltage: 100V- 240V
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Working temperature: -20 to +60
Storage temperature: -25 to +70
- Double tone multi-frequency function (DTMF)
Weight 10KG
Size 400mm x 125mm x 130mm