Wireless Barcode Scanners w/ on-board memory

http://www.motorolasolutions.com/US-EN/Product+Lines/Symbol/Symbol+Bar+Code+Scanners/Motorola+CS3000+Series_US-EN.

Can you just use a smartphone?

That was my first recommendation, srboisvert. They definitely want dedicated devices.

I won't speak for Kreiger, but a proper scanner is MUCH faster at scanning than a smartphone. If you have one or two barcodes to scan, a smartphone is ok. If you have a lot, it's a major pain. Also, a laser-based scanner like the one I recommended can scan from several feet away. A CCD scanner needs closer range, and a smartphone typically needs closer range still (unless the barcodes are huge).

Rock Steady and primethyme, I've actually come across those in my Googling, but I was a little leery of buying something without a pistol grip on it. I haven't had to use them for much before, though, so I could be imagining a requirement here that isn't needed.

http://ask.metafilter.com/249797/Wireless-Barcode-Scanners-w-on-board-memory#3627716: Rock Steady and primethyme, I've actually come across those in my Googling, but I was a little leery of buying something without a pistol grip on it. The one I've used sits really well between your thumb and forefinger, so ergonomics really shouldn't be a problem. It's also got a little ring on the back that you could attach to a wrist strap or other lanyard-type situation.

I have used scanners with pistol grips as well as the small Motorolas. I prefer the small ones because they're lighter and less fatiguing to use for a long period of time. You can put them on a lanyard if you're worried about them being dropped. However, if I wanted a pistol grip scanner, I'd just look at whatever the cheapest Motorola/Symbol laser-based model is, and get that. I haven't looked at them recently, but they must have one with a similar onboard memory feature.