Keep your actions stealthy, movements precise, and your tools long-lasting. MX Master 3S quiets your clicks and scrolling so you feel, not hear, your actions. An 8,000 DPI optical sensor tracks exact motions, and its electromagnetic scroll wheel moves down the page at 1,000 lines per second — and can stop on a pixel. Battery lasts up to 70 days on a full charge or 3 hours from a single minute of juice.