Details: ITEM: NEW speaker mic and 3.5mm listen only acoustic tube for Motorola radios with M4 connectors. – Professional quality, water-resistant, remote speaker microphone – Features a 3.5mm accessory jack for connecting an earphone to the unit (Included with this listing) Part# Mic: M4013 M4 Listen Only: E208 3.5mm WARRANTY Includes 1 Year Warranty! COMPATIBLE RADIOS: HT750, HT1250, HT1250LS, HT1550XLS, MTX850, MTX850LS, MTX900, MTX950, MTX960, MTX8250, MTX8250LS, MTX9250 GP140, GP320, GP328, GP329, GP338, GP339, GP340, GP360, GP380, GP640, GP680, GP1280 PR860, PRO5150, PRO5350, PRO5450, PRO5550, PRO5750, PRO7150, PRO7350, PRO7450, PRO7550, PRO7750, PRO9150, PTX700, PTX760, PTX780