Logitech K350 Ergonomic wireless keyboard, 2.4 GHz connection via USB receiver, 17 programmable multimedia keys, 3-year battery life, palm rest, German QWERTZ layout: Amazon.de: Computer & Accessories
Amazon.com: Logitech Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Logitech K350 Wireless Wave Keyboard with Palm Rest
Amazon.com: Logitech Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Logitech K350 Wave Wireless Keyboard M/N Y-R0053 “Doesn't Include USB Receiver” | eBay