Calus M-304 Wireless Optical Mouse.

2.4 GHz wireless connection via USB receiver gives you a stable cordless setup up to 10 metres away • Adjustable 800, 1200, and 1600 DPI optical resolution allows smooth speed adjustments to suit your tasks • Durable plastic body structure provides long lasting reliable everyday use at home or the office • Powered by a single AA battery making it easy to replace and maintain power without charging downtime • Broad compatibility supports Windows XP, Vista, 7, 8, and 10 to fit most laptops and desktop computers • Ergonomic black design gives a clean professional look that matches any modern workstation setup.