Readers generally have USB, RS232, RS485, Wigan, TCP/IP, Bluetooth, GPRS and other data interfaces to connect with the host. Different interfaces correspond to different applications. For example, USB is suitable for office use, such as high-frequency YX7036USB, ultra-high frequency YXUK8, and RS232 is suitable for close-range industrial occasions (many computers don't have RS232 interface now). For example, high-frequency YX909 1T is widely used in industrial automation, book self-service lending and returning machines and other equipment. RS485 is suitable for long-distance bus mode (up to 2000 meters) and is generally used in industrial automation, such as YX 186 1 in production line, TCP/IP is suitable for long-distance or networking occasions, Bluetooth is suitable for short-distance data transmission occasions where wiring is inconvenient, UR6258 with Bluetooth interface can be used for wiring-free forklift refitting, and GPRS is suitable for long-distance wireless data transmission.