Limited Edition. The ZOWIE EC2-B features an Ergonomic design exclusively for right-handed users. It offers users a bigger room for wrist movements. The shape of the right side of mouse is well rounded. It allows the user’s fingertips to hold/cover the mouse to move smoothly. EC-B Series with 3360 sensor comes in two sizes to fulfill different needs.  Try our  to help find what size works for you!