Download here for Functional List, Dimension, Technical Specification, and Model Selection. DOWNLOAD PORTABLE QR AND CARD READERModel: BS53N-MQ WIFI Features; Supports WIFI for PC connection. QR Code and/or ID Cards Transaction. Store up to 100,000 cards and 100,000 offline transactions. Audio indication to differentiate between valid and invalid clocking. Built-in Real-time clock with time adjustment via controller keypad or PC time synchronize. Built-in Mifare, Desfire reader module.