[HIGH-FLOW DESIGN]-The overall shape is full with 3D ergonomic design. It can effectively reduce the hand fatigue [2.4G WIRELESS TRANSMISSION FOR STABLE CONNECTION]-Ensures stable connection, precise tracking, fast data transmission speed, up to 33ft / 10m working distance, eliminating interference [ERGONOMIC & AMBIDEXTROUS DESIGN]-Easy to carry when travel, works for all laptops, desktops and Notebooks running Windows, Mac OS X etc [BATTERY LIFE]-6 month battery life helps you go longer between battery changes (battery life may vary based on user and computing conditions) [EASY TO USE]- It is convenient, no need any driver, plug and play directly. It’s powered by 1 X AA battery [Included]