Offering a precise, compact and versatile experience, the Orbit Wireless Mobile Trackball has everything mobile professionals need for comfort and productivity. It offers better ergonomics, with less wrist and hand movement that will ease the pain of repetitive-stress injuries. With no cables to tie you down, the 2.4 GHz wireless nano receiver works with either Windows or Mac when you’re at home, on the road or in the office. Unique touch scrolling, along with the compact 32mm ball, lets you glide effortlessly through web pages and documents, and the nano receiver can be stored right inside the trackball. Unique touch scrolling lets you glide effortlessly through web pages and documents. Two customizable buttons with Kensington TrackballWorks™ software. Secure 2.4Ghz wireless technology reduces risk of interference and is ideal for office environments. Ambidextrous design for left or right-handed users. USB Plug & Play. A distinctive centered-ball design gives you more comfort and precision. Nano Wireless USB reciever stores inside mouse battery compartment when travelling. Requires 2 x AA batteries (included). On/Off switch helps prevent accidental battery drain. Professional matt black high gloss black finish. 2.4GHz Wireless Nano Receiver - Offering cable-free versatility for productivity on the go, the receiver can be stored inside the trackball for safekeeping when not in use. Provides precise cursor movement for superior accuracy so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. Along with a centered compact 32mm ball, it works equally well for either right-handed or left-handed users. Period of Warranty 5 years.