DEFT wireless trackball mouse, offering comfortable operability. - Brand: ELECOM DEFT - Type: Trackball mouse - Connectivity: Wireless - Power: Uses one AA battery Thank you for viewing. I am selling this because I tried a trackball mouse for the first time and it didn't suit me. I have only used it once. I only used it for a few minutes, but I had planned to use it up, so I threw away the box immediately, and only the mouse itself is available. At that time, I confirmed that there were no problems with the operation. The battery is included, but the remaining amount is unknown. Please forgive any minor scratches or stains that cannot be determined from the photos due to amateur storage. Please check the photos and understand that no claims or returns are accepted.