Joyusing V320
USB Book Scanner
    Portable personal desktop scanner with user-friendly BookScan software. Dual 16MP high-definition fixed focus lens(optional), physical buttons for shooting, zoom-in/out, LED control and A3/A4 switching.
    Portable Design | A3/A4 one key switch | Powerful OCR Supporting 180 languages | Distortion Correction | Intelligent Software
Sensor Size & Frame rate

Similarities between V508 and V500