Barcode Scanner automatic scanner OpticalLight Source 650nm (visible)Scan Mode ... per secondResolution 3mil(PCS 0.9)Scan width Min barcode is20mm,Max barcode is 260mmScan Depth of field 0-800mmScanning angle Twist ... of 5,MSI,Chinese postal code and etc..Interfaces Supported USB,PS2 keyboard,RS232 and etc..Print Contrast 30% minimum reflective ... class 2 laser product, FCC class B and CE Barcode Scanner