Logitech K580 is better than the new K780? - YouTube
Logitech K580 Slim Multi-Device Wireless Keyboard & Mouse With Dongle | eBay
Logitech K580 Slim Multi-Device Wireless Keyboard for Chrome OS - Bluetooth /USB Receiver - Graphite, Medium (920-009210) & Signature M650 Wireless Mouse - for Small to Medium Sized Hands -Graphite | Price History
Logitech K580 Wireless Keyboard Slim Multi-device an Ultra-thin and Design-Forward Keyboard Floating Keycap