Speedbag Champ Counter. As seen at the Drag Race to 300 Contest in Lowell Boxing Club.
 
They are available in black or orange. They only work with the EVO14MP or XR with the teflon core ball, not the stainless steel core ball that comes with it. 
 
Scan QR code inside the packaging for installation instructions. If you have any issues, contact eras.noel@athleticinterpretations.com