grow gm802-l small dc3.3v usb/ttl232 interface 7-50cm reading distance barcode scanner module 1d/2d qr bar code reader pdf417 for arduino, Silver

can read 1d bar code easily and read 2d bar code with high speed. gm802-l lens reading distance is 7-50cm. it also wins high scan speed for linear code, even for bar code on paper or screen..syi