The Lenovo Wireless Mouse N3903 offers exceptional comfort and cordless convenience. It's ergonomic design provides comfort while allowing users the ability to operate with either hand. The integrated on/off button on the bottom of the mouse, allows you to conserve batteries (2 AAA batteries included). Simply plug in the tiny USB nano-receiver and forget it. Get responsive, smooth cursor control with high-definition optical tracking. This mouse will easily operate on wood, carpet, and other difficult surfaces.

• Comfortable ergonomic design.  
• Style is consistent with IdeaPad notebooks.
• Mini USB dongle can be stored inside the battery compartment
• Enhanced optical system easily tracks on wood, carpet, and other difficult surfaces.
• Power saving self-sleep function.
• Dimensions: 105*56*35mm   Weight: 0.058kg(no battery)