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The ParMarLow SM-1100 Speaker Microphones are rugged, weatherproof units with an integral audio earphone plug. The SM-1100 comes standard with rotating clothing clip and coil cord wired to the specific mating connector for your radio. The tactile feel thumb sized PTT switch is fully enclosed in a rubber boot to insure thousands of operations in all environments. The ParMarLow SM-1100 Speaker Microphones are available for most portable two way radios.