Earphone Connection STINGRAY Quick Release Earpiece for Motorola HT MTX MTP PTX Compatible with Motorola HT750, HT1250, HT1250LS, HT1550, HT1550XLS; MTX850, MTX850LS, MTX8250, MTX8250LS, MTX950, MTX960, MTX9250, MTP700 Ex, MTP810 Ex, MTP850 Ex, and PTX780.