GM77-S have USB and UART interface, Scan Speed:15m/min, can Read Long PDF417 Passport Code.

GM77-S mainly parameter:
·Decoding  Ability: 
  1D: EAN- 8,EAN-13,UPC-A,UPC-E,Code 39,Code 93,Code 128,EAN128,Codebar,industrial 2 of
5,Interleave 2 of 5,Matrix 2 of 5,MSI,postal code ect
  2D: PDF417,QR Code ,Data Matrix ect
·Operating Voltage: DC 3.3V
·Operating Current: 180mA
·Interface: TTL-232,USB 
·Dimension: 21.6*12*13.2mm
·Accuracy of reading: 4mil