Wireless trackball, the M575S, offering comfortable operation and eco-friendly materials. - Model Name: M575S - Brand: logicool - Compatibility: Windows/Mac - Features: Wireless trackball - Eco-Mark: Made with 50% recycled plastic I'm selling this because it didn't suit me, even though I bought it. It's almost new, but the box is damaged. It was kept at my workplace, so there's no influence from cigarettes or pets.