Amazon.com: Logitech USB 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 - Office Machine Supplies & Accessories; Office Machine/Equipment Accessory Type: Keyboard/Mouse; For Use With: 10 Operating Systems; Chrome OS; 8; Windows 7; Contents: Logitech Unifying Receiver; User Documentation; (3) AA Alkaline
Amazon.com: Logitech USB 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