This wireless gray Logitech M570 trackball mouse is designed for right-handed use and has five buttons. It is a great way to make navigating your computer easier and more comfortable. The Logitech M570 has a sculpted design that fits the shape of your hand, allowing for long periods of use without strain or discomfort. This mouse features wireless connectivity and does not come with a dongle. The Logitech M570 is a top-of-the-line product that is perfect for anyone who demands quality and performance from their computer accessories. It is a great addition to any workstation, and is sure to improve your productivity and efficiency.