MICROWARE ERGONOMIC DESIGN : The ergonomic design offers your hand maximum support for lasting comfort, Make your hand in a natural handshake position, less overall strain helping alleviate wrist pain. (Note: it is right-handed mouse)Vertical healthy mouse 2.4GHz Wireless Connectivity (USB receiver ), Suitable for PC Laptop Desktop Computer With USB port. Ergonomic designed to remit and prevent carpal tunnel syndrome. RECHARGEABLE WIRELESS MOUSE : Built-in high capacity rechargeable battery, no longer needs to buy batteries. very convenient ! Easy to charge through micro USB charging cable (Approx. 2-hour full). Auto sleep mode and awake the wireless mouse by pressing any key.