Lenovo Essential Wireless USB MouseSpecifications: Connection: Wireless 2.4GHz via Nano USB-A Receiver DPI: 1200 Battery Life: Up to 12 Months Battery: 1 x AA (Included) Buttons: 3 Mouse Shape: Ambidextrous (For both Left & Right Hand users) Weight: 60g Dimensions: 106 x 61 x 33mm Warranty: 1 Year Features: Simple Plug & Play Setup 1200 DPI Up to 12 Months Battery Life (Varies on Usage) Powered by 1 AA Battery (Included) Lightweight & Ambidextrous Design Perfect for Travel & Everyday use USB-A Nano Wireless Receiver is subtle yet powerful What’s in the box? 1 x Lenovo ThinkPad Essential Wireless Mouse 1 x USB-A Nano Wireless 2.4GHz Receiver 1 x User Manual