Everything on the keyboard is Japanese By sort of reading the back if I turn it on and press fn and del it makes it light up and if I press fn and use the up and down keys i can change the brightness of the keyboard but I want to know how I can connect it to my laptop

Hello there! I just picked up this K330 keyboard from a secondhand store. Looks to be in very good condition (see pictures). When I looked it up, I misread that it could be connected via Bluetooth and bought it (yeah, silly mistake). The keys still sound good, nothing sticks, so I figured this could be a good back up keyboard if my current one breaks. I had no way of testing it in the store, but it was cheap enough to get.

It didn’t have a box, so I only have the keyboard itself (no accessories). It uses 2 AAA batteries so I switched out the old ones that the previous owner had left for brand new ones. Looking online, it looks like this K330 was part of a keyboard-and-mouse duo that paired wirelessly with a USB receiver. Without the original receiver, I will need a Unifying receiver but when I checked the back of the keyboard for the orange “star” symbol, it’s gray and no “K330” label (see last picture). I’m assuming I should still be able to pair it with a Unifying receiver, but I figured I’d ask on here before spending the money. Any help is appreciated. Thanks!