Portable scanner Scanning resolutions: 300 to 600 dpi Supports MicroSD card of up to 32GB ... 2 x AA batteries portable mini scanner,A4 size use,300 to 600 dpi Image Sensor:A4 Color Photoelectric SensorScan Resolution ... :227mm * 20mm * 20mmWeight:150g portable mini scanner,A4 size use,300 to 600 dpi