How do I use a usb camera

Now the USB camera is plugged into the USB interface can be used, to avoid the installation of drivers quite annoying, users in the purchase of USB camera as long as directly plugged into the desktop or laptop USB interface can be used normally.

Some USB camera manufacturers' products can be installed after the picture will not be clear, which requires the user to adjust the camera lens by rotating the USB camera lens alignment clarity.

Are there any geographic restrictions on the use of USB cameras? Part of the USB camera may be used in different countries with different frequency, users can manually adjust according to the manual method.