LifeCam

The LifeCam is a lineup of webcams from Microsoft for PC users marketed since 2006. Various models and series of webcams are designed for either laptops or desktops. 
VX Series.
History.
The VX series of Microsoft LifeCam debuted on 13 June 2006, and were available for sale in August 2006 as Microsoft's first entry into selling webcams, with only two models, the VX-3000 and VX-6000. One of the exclusive features include the integration with Windows Live Messenger, by having a Windows Live Call button that can be used to easily initiate a video call.
These models both feature a similar round body design, with a round base, known as the Universal Attachment Base.
The entire series was designed for desktop use, as it used a base for attaching it to a desktop monitor. All webcams of this series interface via USB.
NX Series.
All webcams of the NX series are designed for notebooks and interfaces via USB 2.0.
HD Series.
These series debuted in March 2010 and uses Microsoft's TrueColor technology for improved color balance. They all have 720p HD video resolution and have built-in microphones.