Fangrui Product Details Specification: Material: Plastic Size: 86 X 86 X 42mm/3.4 X 3.4 X 1.7in Weight: 150g/5.3oz Color: Black Card Reader Type: Em Card Or Ic Card Barcode Type: Qr, One/two-dimensional Code Communication Method: Wiegand/usb/rss232/-ip/rs485 Decoding Mode: Image Decoding Reading Direction (bar Code): Angle 45 With The Lens As The Center Point Scan Code Characteristics: Automatic Induction, Buzzer Prompt Operating Voltage: 8-12v Working Current: 800ma Reading Distance(card): 3~6cm Reading Speed: Less Than 200ms Reading Distance(qr Code): 0-20cm : Windowsxp/7/8/10), Linux Working Temperature: -20c -70c Working Humidity: ~ Style: Ic Package Contents: 1 X Qr Code Reader 1 X Data Cable Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.