Optical mouse and Keyboard are available in BD at Multimedia Kingdom

Optical

An optical mouse is an advanced computer pointing device that uses a light-emitting diode an optical sensor, and digital signal processing in place of the traditional mouse ball and electro mechanical transducer. In practice this mouse does not need cleaning, because it has no moving parts. This mouse works in a completely different way. It shines a bright light down onto your desk from an LED mounted on the bottom of the mouse. The light bounces straight back up off the desk into a photocell also mounted under the mouse, a short distance from the LED

A mechanical keyboard that uses infrared light and photoelectric switches to detect a key press. This Keyboards switches have a quicker reaction time than metal switches and have a longer life because there is no metal contact.

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