It's a rip-off and a piece of shit. I'll let you buy it for 22.00 - all plastic, it's a real piece of shit.

Yes, it came with CH layout. But I can't guarantee it. Ask Digitec directly.

Safe

Hi. I also had the problem when I plugged the keyboard directly into a USB 3.0 port 5gbps which can also charge devices when the PC/laptop is not running (lightning symbol on the socket. Power Delivery). A short USB 2.0 extension piece in between solved the problem. I hope that it works for you too. I would be happy if you could give me some feedback.

Yes, illuminated. Brightness can be adjusted.

Yes, any USB keyboard works there :)