I used this only once after purchase, but it didn't suit me, so I'm selling it. I think it's in very good condition as I only used it for about 20 minutes. In addition to the main unit, the USB receiver, the original batteries, and the box are included. Thank you. - Model Name: ERGO M575S - Brand: logi - Type: Trackball - Color: Black - Ball Color: Blue - Connectivity: Wireless - Features: Ergonomic Design - Included Items: USB receiver Thank you for looking.