Logitech M310 Wireless Optical Mouse, Black (910-004277) - Newegg.com
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 Unifying Receiver for Connecting Multiple Devices