DEFT PRO, a high-precision trackball mouse with ergonomic design. - Brand: ELECOM - Model Name: DEFT PRO - Color: Black/Red - Type: Trackball - Included Items: USB, Receiver Unit, Manual - Condition: Used Thank you for viewing. I used it for about a month. There were no particular problems during use. There are no noticeable scratches, but please refrain from purchasing if you are concerned about minor details. The box is torn and has been repaired with tape. Price negotiations are not possible.