ELECOM Wireless Trackball Mouse HUGE, M-HT1DRXBK - Brand: ELECOM - Model Name: M-HT1DRXBK - Type: Trackball (Red) - Color: Black - Features: Wireless connection, 8 buttons, large ball Contents Trackball body x 1 Receiver unit x 1 User manual x 1 AA alkaline batteries for operation check x 2 Thank you for viewing. Operation confirmed. Used 2-3 times, but I'm not used to the trackball movement, so I'm selling it. I will sell it to those who understand that it is a used item. Power supply: Battery-powered