Hand placement at an optimal 57° angle for comfort. Precision and speed scrolling with SmartWheel. Globally available and certified in 100+ countries, ideal for IT professionals and business users. Designed, developed, tested and approved according to criteria set out by leading ergonomists. Four, easy-to-reach customizable side buttons. Connect via Logi Bolt USB receiver and Bluetooth® Low Energy Wireless Technology. Logi Bolt is Security Mode 1, Security Level 4 and the Logi Bolt USB receiver is pre-paired out-of-box. Twenty-four-month battery life with a single AA battery.