Aditional Glasses for use with Nvidia 3D Vision Kits. NVIDIA 3D Vision PCs work with cutting edge LCDs that feature true 120 Hz LCD technology to deliver a full-resolution 3D experience with active shutter glasses technology. With this method, the left & right eye images are presented on alternating frames, but since these monitors are capable of 120 Hz, each eye still sees a full 60 Hz signal that is equivalent to the refresh rate on LCD monitors today. 3D Vision PCs support desktop LCD monitors with resolutions of 1680x 1050 & 1920x 1080. This offers a number of advantages including: Full resolution per eye: In 3D mode Each eye receives the full resolution of the display for the highest possible image quality for text & objects. Wide Viewing angle for 3D Because full images are presented on alternating frames, there are no restrictions on the viewing angle in 3D mode. Users are free to move their heads vertically or horizontally within the full viewing angle of the display without losing the 3D effect or suffering increased ghosting which allowing for comfortable viewing for continuous gaming or movie watching. Great 2D Operation If you decide to switch back to 2D at any time, the performance of 3D Vision PCs support a 120 Hz higher refresh rate that reduces ghosting & blur typically found during motion on existing PCs that have 60 Hz displays. Personalized fit Designed & built by NVIDIA, our high tech active shutter glasses have top-of-the-line optics, include adjustable nose pieces, & are modeled after modern sunglasses. Package Contents: Glasses Nose pieces Pouch USB (Universal Serial Bus) Lead