Optional functions: camera, face recognition system, fingerprint meter, ID card identifier, high beat meter, UnionPay POS machine, barcode/QR code scanner, UnionPay electric card reader, various keyboards (metal keyboard, ordinary keyboard), magnetic stripe card, IC/ID induction card and other card reading systems, various printers (thermal ticket printing, barcode printing, A3 printing, A4 printing, A5 printing), multimedia information query, advertising video playback
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