What does the following term mean regarding different keyboards

[cktlcmd]

I am currently looking to buy a bluetooth keyboard with mouse but encountered some new terms I hardly understood. I was wondering if anyone would be kind enough to explain the differences.

I do understand and know how a BT keyboard and mouse work. No problem with that, but some keyboard only mentions: wireless keyboard, wireless laser keyboard, wireless optical keyboard, optical laser keyboard, etc...

OK, so they are all wireless, but that does mean they are all connected via Bluetooth? The words "optical" and "laser" threw me off. What do they mean? Should I assume if the word "wireless" is in the product description that they are referring to Bluetooth connectivity? But after reading the description, I did not encountered the word Bluetooth, so is there another way to be wireless other than BT (excluding IR of course)?

Forgive me for my ignorance, but I don't want to buy something and regret it later.

...

[toniam]

Most wireless keyboard+mouse combinations usually use RF transmitters, a small usb stick.

Bluetooth is not as common but a good alternative especially from this forum's viewpoint: you can use it to connect phone too :) You can either use computer's built-in BT or usb stick usually supplied with the set. Built-in BT is good solution with laptops.

Optical and laser refer to the mouse and the technology it uses to detect mouse movement. Normal consumer does not really see
any difference between these two but hardcore gamers might.

Hope this helps a bit :)