Also Fits: TP3000, TP3300, TP3550, TP8100, TP8110, TP8115, TP8120, TP8135, TP8140, TP9355, TP9360, TP9400, TP9435, TP9440, TP9445, TP9460, TP9500, TP9555, TP9560, TP9600, TP9655, TP9660. Features: Emergency button, IP54 rated, 3.5 mm port for optional listen only earpiece.