Also keyboards with mouse function, eg with touchpad or trackball, are fully supported. I've tested with an old Enermax Aurora Wireless with integrated trackball.
Typical of ATEN are the versatile configuration options. This way you can set via keyboard shortcuts, whether there are the Bluetooth connection remains when you switch to another device or is disconnected and only rebuilt when switching back. The keyboard layout you can switch to Mac and iOS. The download of the manual is highly recommended, on the supplied leaflet all functions are far described. Also firmware updates are available.
For the keyboard a set of stickers with the hotkey and additional features is included. As a smart phone or tablet stand it works well, for a 10-inch tablet but it could be a bit small.