The Sprint 3G/4G Dual Mode Sierra 250U wireless modem connects to your laptop, netbook, or PC via rotating USB, so you can make the most of any tight spot. Imagine how productive youll be, accessing the Internet at up to 4G speeds. Check email, participate in web conferences, download massive presentations - all from wherever your mobile office takes you. Whether youre at the park, the doctors office, or the airport, you can get connected - fast.