Hello, Kiddo65. 

I hope you're fine and well today. 

As long as the portable scanner is TWAIN-compliant, it'll work with QuickBooks Scan Manager. Before getting one, I'd recommend contacting the manufacturer and ensure it's using the TWAIN protocol. You can also look at the product reviews, specifications, and browse for user recommendations. 

I'm linking our installation guide article again to help you set up your portable scanner. Also, my colleague has posted a list of tested compatible scanners. You can visit their post here in case you want to look for other options. 

You can mention my username if you have other questions aside from scanning documents in QuickBooks.