User manual Logitech MK850 Performance (English - 2 pages)
Logitech MK270 wireless keyboard and mouse set, 2.4 GHz wireless connection via nano USB receiver, long battery life, for Windows and ChromeOS PCs / laptops, German QWERTZ layout - black: Amazon.de: Computer
Bluetooth-Tastatur-Test: Wireless Keyboards für Handy, Konsole & Tablet
Anleitung für Logitech Bluetooth® Multi-Device Keyboard K480
How to Connect Wireless Keyboard to PC: 12 Steps (with Pictures)