RIVAL 105 – Rival 105 is custom-engineered for gaming, featuring a custom S3059-SS optical sensor and a right-handed universal ergonomic design based on the legendary SteelSeries Kana shape for all grip styles. With a guaranteed 20-million click rating and a durable, lightweight 80g construction, the Rival 105 delivers comfortable, long-lasting performance. Plus, Prism RGB illumination with GameSense reactive illumination and lighting sync, six programmable buttons and on-board memory combine to deliver the perfect gaming mouse.