Logitech M325 Wireless Mouse with Designed-For-Web Scrolling - Tweet Tweet Sensor technology: Advanced Optical Tracking Sensor Resolution: 1000 Number of buttons: 5 Scroll Wheel (Y/N): Yes (with Micro-precise scrolling); Tilt scroll function (Y/N) Yes Battery life: 18-month battery life* ; Battery type: 1 AA battery (pre-installed)