This right handed ergonomic mouse is designed for hand size of 17-19cm from wrist crease to longest finger. The Handshoe Mouse was invented to combat this strain by allowing the hand & fingers to sit in a natural resting position on the mouse & virtually eliminating tendon movement in the fingers. Its unique shape supports hand & wrist stability & the buttons only require touch force in order to operate. It offers USB (Universal Serial Bus) wired connection.