Set up your Magic Keyboard, Magic Mouse, or Magic Trackpad with your Mac - Apple Support
Lenovo Essential Wireless Keyboard and Mouse Combo French Canadian 058 USB Wireless RF French Canada USB Wireless RF Laser 1200 dpi 5 Button Symmetrical AA Compatible with Tablet Notebook Desktop Computer Windows
How to Connect Wireless Keyboard to PC: 12 Steps (with Pictures)
iMac Magic Keyboard - Apple Support
HP PCs - Wireless keyboard troubleshooting | HP® Customer Support