Logitech Wireless Mini Mouse M187 Ultra Portable, 2.4 GHz with USB Receiver, 1000 DPI Optical Tracking, 3-Buttons, PC / Mac / Laptop - Black (with White Stripe) - Optical - Wireless - Radio Frequency - 2.40 GHz - Black - USB - 1000 dpi - Scroll Wheel - 3 Button(s) - Symmetrical