Specifications: Model: MS320 Color: Black Connection Type: Wireless Operating Distance: 10 (m)/32.81 ft Interface: USB Wireless Transmission Frequency: 2.4 GHz Operation: Optical Photoelectric Resolution: 1600DPI Roller Direction: Two-way Number of Buttons: 3 Battery: 1 X AA Battery (excluding) Product Size: 110 X 61 X 34 mm/4.33 X 2.40 X 1.34`` Product Weight: 60 g

3D mouse button design. Optical engine, accurate positioning Plug & Play 1200 dpi tracking Engine High Durability Ambidextrous design for left and right handed