Touch screen device is a video display screen, either liquid crystal display or cathode ray tube that has been engineered to also serve as an input or interface device. There are two touch technologies that can be used, light pen or touch overlay, both of which output an XY coordinate signal. Of the two touch screen technologies, the touch overlay is by far the most commonly used touch screen system for residential systems. Touch screen multiple-device controller that can either be hard-wired into a centralized home system controller or interfaced using RF or IR signals to a nearby receiver.

USB converters are designed to make serial port expansion quick, easy and simple. Connecting to a USB port on computer or USB hub, the converter instantly adds a RS232 serial communication port to system. It is automatically detected and installed upon connection to the USB port. There are no interrupt request port conflicts, since the port do not require any additional interrupt request, direct memory access, memory as resources on the system. The converter is powered by the USB port-no external power required. 

USB fingerprint mouse is a fingerprint recognition mouse equipped with an optic fingerprint recognition module. It supports both USB and parallel, deployed in every field like computer security, electronic settlement of accounts, E-commerce and for exact authentication of individuals. It is used in banking and financial system security and medical information system applications.

USB fingerprint scanner is a device for computer security. It can be plugged into a computer separately with mouse. It is a convenient device for security instead of password that is vulnerable to fraud and is hard to remember. It is used in electronic transactions, banking and financial system applications. It is also used in any password application.

USB Hard Drives have the capabilities to be a true plug and play. It can hold up to 1TB. It also has many other capacities that include 750GB, 500GB, 320GB and 250GB. It stores a whopping 5GB. The 4-inch USB also comes loaded with software to easily create partitions and a boot disk. 

USB-External Floppy Disk Drives are bootable with most notebook computers. These are compatible with Windows 2000, ME, XP and Mac OS 9 and higher. These can read and write to 3.5″ floppy diskettes, including 720K/1.44MB Windows-based format and 1.4MB Macintosh format. These allows to connect and disconnect without restarting notebook