Amazon.com: Logitech K400 Plus Wireless Touch With Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-connected TV, Windows, Android, Chrome OS, Laptop, Tablet - Black : Electronics
Logitech K400R Wireless Touch Keyboard with Touchpad (NO RECEIVER) | eBay
Logitech K400r Wireless Keyboard with Built-In Touchpad and Unifying Receiver | eBay