Compact design – slim, stylish, and comfortable to use, the Lenovo 300 Wireless mouse travels with you wherever you need it Nano USB receiver – with the simple USB dongle that stores right inside the mouse, you can quickly connect to your windows computer Easy to use – the convenient design makes this three-button mouse perfect for right or left-handed use. Includes left and right buttons plus a scroll click Always ready to go – you'll get 12 months of life with just 1 AA battery, making this USB mouse good to go whenever you need it Small and lightweight – Designed for portability and travel, The Lenovo 300 Wireless mouse weighs just 100 g (3.5 oz) or less, making it easy to slip into your backpack or laptop bag