The M330 Silent Plus Wireless Mouse from Logitech is fully equipped and finished, and provides the same click feel without the noise. The rubber wheel makes it easy to scroll through long documents. The silent plus mouse uses rubber coatings to fit comfortably in the palm of your hand. 90% noise reduction makes it enjoyable quiet to use. Features high-performance material and a rubber wheel for quiet gliding and scrolling. Plug and play makes it easy to enjoy a wireless connection with no set up and software needed. The mouse M330 comes in black for a stylish touch to your desk. Includes AA battery that may last up to 24 months. Battery life will vary depending on the product configuration, product model, applications loaded on the product, power-management setting of the product, and the product features used. As with all batteries, the maximum capacity of this battery will decrease with time and usage.