DataJack U760 USB Modem (No Contract Pre-Paid 3G) DataJack’s service allows customers to utilize a nationwide 3G mobile broadband network, with no contract, activation fees, or cancellation fees... and you can choose from 4 service plan options to fit your data needs! How it works: you purchase the modem and your first month of service (choose from 200MB for $9.99/mo, 500MB for $19.99/mo, 1GB for $29.99/mo, or 5GB for $49.99/mo). 3Gstore will activate the service for you (you can choose whether you want us to activate it before we ship or if you prefer to wait until you receive it) - after your first month is up, you can then choose to pay for another month, set up recurring billing, or simply let the service stop until the next time you need it. No credit check or personal information is required, and you can cancel any time. Read more at our FAQ page . IMPORTANT RETURN POLICY INFO: DataJack devices have a 15-day return period (beginning the day your service is activated), and we can ONLY accept returns if you have used LESS THAN 100mb of data. If you have used less than 100mb, you are eligible for a refund for the device and the first month of service, less the standard 20% restocking fee. Datajack devices are non-returnable if you have used more than 100MB of data. Make sure to read the full RMA policy before ordering. IMPORTANT: this USB modem can ONLY be activated with DataJack's service - it can't be used as a replacement device for an existing contract, nor can it be used for any other service (e.g. pay-as-you-go, etc) Specs Compatibility: Windows® Vista and XP or Macintosh OS X or Linux Dimensions: 2.24 X 0.98 X 0.47 in (inserted into USB port) Weight: .67 ounces Chipset: Qualcomm® QSC6085 Frequency: Digital dual-band (CDMA 1900 and 800 MHz); supports EV-DO 1XRTT, Rev-0 and Rev. A where available Antenna: Built-in, external antennas sold separately System Requirements: Memory: 64 MB Disc Space: 32MB Processor: Pentium 150 MHz or higher Slots: USB port