Ergonomic design black trackball. - Brand: logi - Type: Trackball - Color: Black - Features: Ergonomic design Thank you for viewing. Basic functions work without any problems. I think this is a well-regarded product even among Logicool trackballs, so it's also recommended for those new to trackballs. It's in clean condition with little sign of use, but please consider that it is a used item before purchasing. Connection type... Wireless (Bluetooth)