Minimize movement and maximize comfort with ERGO M575 – a wireless trackball with a sculpted ergonomic shape. With no need to move your arm around to move the cursor, your hand and arm stay relaxed. The smooth and responsive thumb control can be used anywhere – and since it doesn’t need to be moved – ERGO M575 is perfect for tight desk spaces. ERGO M575 has been designed and developed to ergonomically fit the shape of your hand. And with no need to move your arm around to move the cursor you’ll reduce fatigue in your hand and arm.