Gigabyte Eco Friendly Wireless Optical Mouse (GM-AIRE M73) Eco-friendly - easy power-shut save your power anytime! The thoughtful design of on-the-top power key makes it more intuitive to power your mouse. Sapphire blue optical sensor the mouse is so responsive and easy to control. You will find the precision of tracking beyond your imagination. Internet backward & forward buttons use these internet backward & forward buttons when browsing web pages, and feel the convenience brought by them! 7-month battery life with only 2 aaa batteries, aire m73 is able to work for you for 7 months! With the easy power-shut design, the battery life can last even longer! Let's go green and save energy together. Curves and coating of aire m73 is just attractive that you'll find it hard to refuse. Ergonomic design is ideal for right-handed users, while the non-slip, plastic panels on the side provide comfort and extraordinary hand-feeling. High quality scrolling wheel Low-power indicator Portable nano receiver