SteelSeries Rival 3 Mouse with 6 Programmable Buttons and an 8,500 CPI TrueMove Core Optical Sensor Divided Trigger Buttons Ergonomic Black Brilliant Prism RGB Lighting: Extremely Sturdy Materials In a lightweight 77g form factor, state-of-the-art engineering and premium polymer can endure severe wear and tear, minimizing hand fatigue. 60 Million Mechanical Switches That Click Along with a left/right split trigger button design, durability is increased by a dual spring mechanism.