Re-Program your keyboard & mouse receiver with Logitech Connection Utility - YouTube
logitech Wireless Keyboard User Manual
Logitech Wireless Keyboard K270
Amazon.com: Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Receiver, Ultra-Thin, Compatible with PC, Laptop - Black : Electronics
Logitech Wireless Keyboard K270 (920-003051)
Amazon.com: Logitech MK270 Wireless Keyboard and Mouse Combo — Keyboard and Mouse Included : Electronics
Logitech Wireless Keyboard Not Working Troubleshooting Guide - YouTube
Logitech K270 Wireless Keyboard 820-006477 (No Mouse or USB Receiver) (Warranty) | eBay
Amazon.com: Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Receiver, Ultra-Thin, Compatible with PC, Laptop - Black : Electronics
User manual Logitech Wireless Keyboard K270 (English - 2 pages)
How To Reset Wireless Keyboard: Quick Troubleshooting Guide | TransitWirelessWifi