If you have a Mac/Windows, the first thing you should do is press the combination (blue FN key with the key below ESC) to set your operating system. Then it should work with the @
On the Swiss keyboard, the @ sign is usually written with the key combination "Alt Gr" (to the right of the space bar + the number "2". I hadn't realised until now that this wouldn't work with the Rapoo keyboard...
Sent back this device. I bought two, and after 1-2 months Bluetooth was working bad, software support was bad. I bought HP gaming mechanical keyboard. Works like a Horse 🐴:) top