The Sipgate SG-HS100b USB VoIP Phone
Here we have the SG-HS100b USB handset which is a superb accessory for your laptop computer for users of VoIP on the move. The SG-HS100b USB handset can also work with a normal standard PC whether in the home or office.
Usage of the SG-HS100b USB handset will require a softphone such as sipgate X-Lite along with broadband connectivity, and only requires one free USB port. The SG-HS100b USB handset’s integrated VoIP soundcard will separate voice conversations from the usual remaining PC system tones and also incorporates anti-jitter and echo controls.
Source — sipgate