I purchased the "Logitech K810" with "German keyboard layout". I use it with a Windows desktop and the Nexus 7 (2013). My old, wired Tastaur choked repeatedly individual letters and the Nexus screen keyboard caused due to my slightly thicker fingers - incorrect entries. The "K810" met my idea with both devices. The attack is soft and precise, the key spacing is sufficient. Pairing almost went smoothly, only when I had to fumble a bit NEXUS. The update to Android 5.0.2 has led to some changes in the inputs. Otherwise, the keyboard works with both devices without any problems. The lighting is a great enrichment in cloudy weather and in the evenings. I can nocht say anything about the operating times with one battery charge - because I test yet. The battery can be loaded either by computer or AC adapter (from Nexus). The Tastur allows a "Logitech SetPoint software ---" some keyboard customizations. The F-keys can be used - to stone position only by pressing the Fn key (bottom left) to use, while the F-keys 1 - 3 are provided for switching of up to three compatible computer. This can be changed with the L-Software, precisely - the F - keys normally as any other keyboard use and for the computer-switching (3 been paired devices) with pressing "FN and 1, 2 or 3" perform.
The purchase price of the keyboard is indeed high but justified - I can only recommend.
