Ion Audio Pics 2 SD
1800 x 1800dpi
The highest resolution the scanner can put out without using software to make it bigger. In dots per inch.
Canon CanoScan LiDE 700F
9600 x 9600dpi
The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
With more USB ports, you are able to connect more devices.
HP Scanjet Enterprise 7000nx
Film scanners can scan film negatives.