Guangzhou State Association, scanner maintenance, scanning guns provided by the Guangzhou State Association. We are Guangzhou City State Association Information Technology Co., Ltd. (www.gzdb899.com) located: Guangzhou specializes in: cash register, scanner, bar code machines, management software, small ticket machines, cash registers, shredders scanner can divided into wired and wireless scanning gun scanner two kinds. Wired scanner, as the name suggests, is through the data line with a computer or POS machine for data transmission. Wireless scanning gun, also known as cordless scanner. General transmitting data via Bluetooth, wifi, etc., can not restrict the length of the data cable to transfer data, the use of more convenient. Prices, wireless scanning gun many times higher than the wired gun. Wireless barcode adapter is a kind of scanner can be wired to a wireless scanner to convert the product. Wireless scanning gun into high middle and low product prices depends mainly on the scanned bar code type (one-dimensional or two-dimensional), followed by barcode scanning finesse, such as the need to scan a small bar code, then the ability to decode the scanner requires very high , its price will be higher property right. The main purpose of the wireless scanner can scan the bar code does not need to connect the line to complete the transfer to the destination computer, then the current mobile phones can also scan the bar code, the market has some free mobile phone to scan bar codes and sent to a computer phone software, you can achieve wireless scanner results. In fact, the serial barcode scanner and keyboard barcode scanner, its advantages and disadvantages who is a: external power supply. Why use a serial barcode scanner? External power supply in appearance a bit ugly, but must Cadogan a power connector, but precisely because of this scanner maintenance, it does not use the computer's power supply voltage is guaranteed. Some bar code scanner for voltage requirements are relatively high, keyboard port connected to the load after the bar code scanner 1504 two-dimensional code scanner, the voltage on the low down, is not working. And serial port can take a variety of host devices: PC, cash registers and terminals scanner, keyboard wedge barcode scanner application scope as good as it. Let's make a comparison, in fact, should choose serial or keyboard port according to their own needs. Compare the contents of the serial keyboard port USB port Power External 1900 scanner, such as the power supply can also be converted organic, such as PC, POS machines are also available from PS / 2 fetch electricity (expert level in order to do so) from the keyboard, no external power USB port, no external RS232 standard length by 200 feet (60 meters), the actual but also longer 1.5 to 5 m USB specification 1.5 to 3 meters Applications PC, POS, industrial machines, terminals, data terminals PC, part POS machines, part of the terminal PC, Mac driver Scanpard, WinCom2key, com2key need to be supported by Windows, Windows built-in input speed the pace has not been tested in conjunction with the other two