Handheld scanning gun is the product of the technology formed in 1987, the shape is very much like a supermarket cashier to take the hand in the use of bar code scanning gun. The vast majority of the scanning gun with CIS technology, optical resolution of 200dpi, there are black and white, gray, color of a variety of types, in which the color type is generally 18 bit color. There are also individual high-end products using CCD as a photosensitive device, can achieve a true color, the scanning effect is better.