The Corsair M55 RGB Pro is a lightweight ambidextrous mouse at 86 grams wired with the PMW3327 sensor, featuring a true ambidextrous design with removable side buttons on both sides. At $39, the M55 offered a symmetrical shape that genuinely worked for left-handed gamers — a segment badly underserved by the gaming mouse market. The removable side buttons could be swapped to either side, with magnetic covers filling unused slots for a clean look. The RGB lighting integrated with Corsair's iCUE ecosystem for full customization. While not targeting the competitive ultralight market, the M55 served a practical purpose for players who valued ambidextrous functionality at a budget price. It's one of the few affordable mice that takes left-handed gaming seriously.