Originally co-developed by former professional Counter-Strike player, Emil 'HeatoN' Christensen of Ninjas in Pyjamas, the EC1-A has an ergonomic design exclusively for right-handed users. The well-rounded and fitted shape of the mouse offers users more room for wrist movements when in game, providing a more comfortable and enjoyable gaming experience. The EC series comes in two sizes to fulfill different needs. The EC1-A is the largest in the EC Series.