The Logitech MX Master 4 is a high-performance wireless productivity mouse that was officially released on September 30, 2025. It features several upgrades over its predecessor, including haptic feedback and an "Actions Ring" for enhanced workflow efficiency.

• Haptic Feedback: A core innovation for the MX Master 4 is the customizable haptic (vibration) feedback on the thumb rest area, which provides tactile cues for various actions, notifications, and shortcuts.
• Actions Ring: This feature, accessed via a new button near the thumb rest, brings up a customizable on-screen menu for quick access to app-specific tools, potentially saving up to 33% of time on specific tasks, according to a Logitech study.
• MagSpeed Scroll Wheel: The mouse retains the signature electromagnetic scroll wheel, which can switch between ultra-fast free-spin mode (scrolling up to 1,000 lines per second) and precise ratchet mode. It also has a secondary thumb wheel for horizontal scrolling.
• High-Precision Sensor: It uses an 8,000 DPI Darkfield sensor that tracks flawlessly on almost any surface, including glass (minimum 4mm thickness).
• Connectivity: It offers enhanced connectivity, supporting both Bluetooth Low Energy and the secure, high-performance Logi Bolt USB-C receiver. It can pair with up to three devices simultaneously.
• Battery Life and Charging: The mouse provides up to 70 days of use on a full charge, with a quick-charge function providing up to three hours of use from a one-minute charge via USB-C.
• Ergonomics and Durability: The design is an ergonomic right-handed shape for comfort during long sessions, with a new, more durable hard textured plastic and dense silicone material that is more stain-resistant than the previous soft-touch rubber.
• Software Customization: The Logi Options+ software is required to customize the various buttons and features, including the haptics and Actions Ring, with app-specific profiles available for programs like Adobe Photoshop and Zoom.