features: (1)high speed usb keep speedy picture transmission,experience smooth,full motion 30fps ditital video streams and top quality images,it is also compliant and works perfectly. (2)driver free on xp or later os,on win200 os need driver (3)high image quality and zero lag time video resolution up tp pixels interpolated image and at 30 frames per second. (4)built-in noise canceling microphone no noise & echo interference, just like talking with face to face (5)automatic image centering no matter where the camera is positioned on the monitor, your image will always appear in the center of the screen