Logitech V220 3-Button Wireless Notebook Optical Scroll Mouse & Neoprene Netbook Sleeve - Fits up to 10.2" (Black/Blue) Logitech V220 Cordless Optical Mouse w/10.2-inch Netbook Sleeve General Features: Color: Blue/Black Compact, portable size ideal for use with notebooks High definition optical tracking (1000 dpi) 3-button layout Four-way (tilt wheel) scrolling plus zoom Wireless USB mini-receiver Receiver snaps into mouse for easy transport LED battery indicator Automatic sleep mode Ergonomic design and non-slip rubber side panels