The item for sale is a

Motorola NTN8063A Replacement High Activity "D" Button 

Brand new, genuine OEM.

Description:

Allows you to hang your radio from your belt without a case or belt clip. Works with a 2.5 or 3 inch belt loop (not included). Makes it easy to remove the radio from your belt.

Compatible with MT2000, MTS2000, HT1000, MTX8000, MTX9000