This model supports both Bluetooth and a USB receiver. Used only a few times at home, so it works well and has been used for a short period. The trackball and buttons respond without any problems. It has been cleaned and is ready for you to use comfortably. *Returns are not accepted to prevent product switching. To avoid any issues, please be sure to check my profile before purchasing. I will only conduct transactions with those who agree to the rules outlined in the profile.