The Kensington K72359WW Expert Wireless Trackball Mouse is a sleek black mouse designed for precise cursor control. With a unique trackball design and programmable buttons, this mouse offers a comfortable ergonomic experience. It also features 4-way scrolling and connectivity options including wireless, Bluetooth, and RF. The optical tracking method ensures accurate and smooth cursor movement, making it a reliable choice for users looking for a high-quality and efficient mouse. This mouse has 4 buttons and does not come with a charger or cables.