Logitech Wireless Touch Keyboard K400 Plus with Built-In Touchpad for Internet-Connected TVs (Certified Refurbished) Certified Refurbished product is tested & certified by Logitech to work like-new. The product includes all original accessories, and is backed by a 90 day warranty. Wireless HTPC keyboard for PC connected TVs, 80-keys, Media-friendly TV keyboard, Plug-and-play setup STEPS FOR SETUP: Plug in receiver. Go to Logitech Support Page for K400 Plus. Select windows version in the dropdown menu Click download now. Run and install the program. Click add device. Click add unifying device. Follow onscreen prompts. Built-in 3.5-inch touchpad with left & right mouse buttons, 33-feet (10-meter) wireless range Designed for use with Windows 7, 8, 10 and later, Android 5.0 or later, and Chrome OS