Thank you for viewing. This is an ELECOM wireless trackball (M-IT10DR series). I used it for only 2-3 hours and decided it wasn't a good fit for me, so I'm selling it. There were no problems with its operation. - Brand: ELECOM - Model: M-IT10DRWH - Type: Trackball - Connection: Wireless 2.4GHz - Number of buttons: 5 - Power source: Battery - Features: Thumb operation, 36mm ball, artificial ruby support - Accessories other than the main unit: Receiver, AA alkaline battery for operation check, removal tool, box (outer box, inner box) Please consider this item as used, as it has been used for a few hours.