The little computer in the printer has only the code to support the usb device it's programmed for. By now you know that usb bluetooth dongles are not interchangeable. I won't dive below that level of explainer here.
If you want to try a 10 buck device go right ahead but if you want it to work the first time get the dongle from its maker.
I've got a Canon MP460 printer that is bluetooth-compatible. I'd like to get an adapter to put that function to use, but am not sure about what's what.
The user guide for the printer says that what I need is a BU-20, which appears to be a USB device. If I search specifically the Canon BU-20, they're selling for anywhere from $50 to $78. But when I search for "USB bluetooth adapter" I see off-brand companies like Belkin selling them for like $10.
Is this the usual brand-name price gouging, or am I actually looking at two different pieces of equipment? Obviously I'd prefer the $10 one if it'll do what I want it to do.