Realign into a more natural posture. And relax into focus, all day long with Lift Vertical Ergonomic Mouse — a great fit for small to medium hands, with a left-handed option available too. This set contains a Logi Bolt Usb Receiver, 1 x Aa Battery, Quick Start Guide, Logitech Mx Palm Rest, User Documentation, Limited 1-Year Hardware Warranty, and Knox Gear 4-Port Usb 3.0 Hub.