Logitech M500s Advanced Corded Mouse with 7 Custom Buttons
Amazon.com: Logitech C-U0007 Unifying Receiver for Mouse and Keyboard Works with Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) (C-U0007) : Electronics
910-005784, Logitech 7 buttons, 400 - 4000 DPi , 1.8 m, 69 x 126 x 42 mm, 144 g | EET