Logitech Unifying Receiver für Logitech K400 Tastatur & Logitech K350 Tastatur | eBay
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
Original Logitech Keyboard K400r K400plus Unifying Mirco Dongle Receiver USB | eBay