DURAGADGET Mini USB Laptop Mouse with Handy Scroll Function for New Samsung Chromebook 3 (2016) Digital optical sensor for increased durability and performance Retractable cable facility to prevent cable tangling up (extends to 70cm) and add extra ease of carrying in your laptop case Small, contoured shape easily fits left or right hand - stylish and soft finish gives a tactile feel Ergonomic and intelligent retractable cable design allows you to manipulate the length of your mouse cable to your desired length Works from any USB 2.0 or 3.0 connection, with a scroll function for easy browsing, left and right mouse button