Logitech M570 Wireless Trackball Mouse provides an ergonomic solution for comfortable computing. This thumb-operated trackball stays in one place, reducing arm movement and saving desk space. It features a sculpted shape to support your hand, programmable buttons, and a scroll wheel for efficient navigation. The 2.4 GHz wireless connection ensures reliable performance without the clutter of cables. Perfect for small workspaces or users seeking a more stationary pointing device. Includes the blue trackball. Requires a Logitech Unifying receiver (not pictured) and one AA battery for operation.