Brand: WiWU Type: Wireless Mouse Model: WM107 Connection Type:2.4 GHz Wireless via Nano USB DPI:1200 DPI Power Requirement: 1 AA Buttons: 3 (left click, right click, scroll click) Dimensions: 123*127*160mm Additional Features: Small and Round Mouse, Durable and Easy to Carry, the Design Is Simple and Useful, the Button Structure Design Follows the Lever Principle, Good Using Experience Weight: 114g