A

1.The information to be encoded can be text or numeric data. Usual data size is from a few bytes up to 1556 bytes.
2. A Data Matrix symbol can store up to 2,335 alphanumeric characters.
3.Supports any international language character encoding.
4.The code can be read with only need 20% contrast ratio in worse industrial environments.

A

1.The data in a QR code can be alphanumeric, numeric, binary or Kanji (Kanji is a form of Chinese characters that are used in the modern Japanese writing system).
2.A barcode can be stored at maximum character storage capacity 7089 max numeric only characters or 4296 max alphanumeric characters or 1,817max Japanese characters or1,800 max Chinese characters.
3.QR codes can be dirty or damaged up to 30% and still be readable (depending also on the quality of the scanning software and device).
4.Each black and white square in a QR code represents “one bit,” encoding different characters into the text. QR codes use three big squares for alignment so you can scan them in any direction.

A

1.A barcode reader or barcode scanner is an optical scanner that can read printed barcodes, decode the data contained in the barcode to a computer.
2.Barcode readers can be differentiated by technologies as follows:Laser scanners, CCD readers (also known as LED scanners), Camera-based readers.
3.Barcode readers can be distinguished based on housing design as follows:Handheld scanner, PDA scanner (or Auto-ID PDA), Automatic reader, Cordless scanner (or Wireless scanner).
4.Methods of connection:PS/2、RS-232、USB、Wireless networking、Bluetooth

A

1.Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of a tiny radio transponder, a radio receiver and transmitter.
2.RFID can be used in a variety of applications,such as: electronic key for RFID based lock system, access management, tracking of goods, tracking of persons and animals, toll collection and contactless payment, machine readable travel documents , smartdust (for massively distributed sensor networks), locating lost airport baggage , timing sporting events, tracking and billing processes.
3.RFID systems can be classified by the type of tag and reader. There are 3 types:Passive Reader Active Tag, Active Reader Passive Tag, Active Reader Active Tag
4.An RFID system consists of a tiny radio transponder, a radio receiver and transmitter.
5.RFID tags which encapsulated into variety shapes like Card, key fob, wristband, laundry tag etc.

A

1.A label printer is a computer printer that prints on self-adhesive label material and/or card-stock (tags).
2.Label printers are different from ordinary printers because they need to have special feed mechanisms to handle rolled stock, or tear sheet (fanfold) stock.
3.Common connectivity for label printers include RS-232 serial, Universal Serial Bus (USB), parallel, Ethernet and various kinds of wireless.
4.There are two common types of thermal printer:Direct thermal printers use heat sensitive paper (similar to thermal fax paper). Direct thermal labels tend to fade over time (typically 6 to 12 months) Thermal transfer printers (can use ribbon to make the label for smudge resistant and scratch.)
5.Various types include desktop label printers, industrial label printers, mobile printers which can RFID readers.