Speaker Microphone for ADI/Icom/Standard/Yeasu Two-Way Radios and Cobra/Motorola FRS Series Family Radios w/Top Mounted Plugs (JD-3611) Larger palm sized microphone for comfortable use High quality microphone with built-in 36mm speaker Optional earphone jack for private listening Tough, water-resistant, high-impact plastic housing Perfect for indoor, outdoor and recreational activities