A4 flatbed, USB powered scanner by Canon.

Here is the spec from the Canon website. The user manual, software drivers and operating software are all still available, it appears, on their website. It works as a simple Plug & Play on my Linux OS system, but I now have a multi function scanner/printer that I use instead.

Enjoy high resolution scans up to 2400 x 4800 dpi with CIS sensor
Capture photos with exceptional detail and accurate colours thanks to 48-bit internal colour depth
Save time with 300 dpi A4 colour scan delivered in just 16 seconds
Experience the freedom to scan directly to cloud services using your PC
Operate effortlessly thanks to 4 EZ one-touch buttons
Enhance text, graphics and images separately in scanned documents using Auto Document and Photo Fix technology
Instant document recognition with one click using Auto Scan
Power and connect using a single USB cable to minimise desk clutter

If you respond to this offer, please check your Spam/Junk folder regularly as replies often end up there, and I will only deal with good communicators.

Canon LiDE120 A4 scanner (Sawbridgeworth CM21)