Lift Vertical Ergonomic Mouse — a great fit for small to medium hands. Has six Buttons (Left/Right-click, Back/Forward, Middle button, Scroll-wheel with middle click). I good condition, but there are some signs of use (pictured). Works great with Mac and PC. The plastic parts in LIFT include certified post-consumer recycled plastic to give a next life to plastic from old consumer electronics and help reduce our carbon footprint. Dimensions: Height: 4.25 in (108 mm) Width: 2.7 in (70 mm) Depth: 2.8 in (71 mm) Weight: 4.4 oz (125 g)