2 in 1 Barcode QR Code RFID Access Control Reader Fast Scanning Speed for Smart Home Office Building Item Type: RFID Barcode Access Control Reader Material: PC, Acrylic Usages: Widely used in business office building visitor entry personnel management, scenic tourist personnel management, community visitor entry and exit management, administrative hall access control management, smart home, etc. Card Type: EM card or M1 card Barcode Type: Barcode, QR Code Communication Method: USB Decoding Mode: CMOS QR Code Reading Direction: Take the lens as the center point and the inclined plane is 45° Scanning Features: Automatic induction, buzzer prompt Working Voltage: 8-12V Working Current: 150mA Card Reading Distance: Approx. 3-6cm/1.2-2.4in Reading Speed: <200ms QR Code Reading Distance: Approx. 0-20cm/0-7.9in Working Temperature: -20℃ to 70℃ Working Humidity: 10%-90% Operating System: For Windows XP 7 8 10, for Linux Built in Horn: Buzzer