Heavy Duty 3-Wire Surveillance Kit: Features acoustic tube earphone with TWIST CONNECTOR, remote PTT switch and low-profile lapel microphone. Straight cable.

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Heavy Duty 3-Wire Surveillance Kit: Features acoustic tube earphone with TWIST CONNECTOR, remote PTT switch and low-profile lapel microphone. Straight cable. The SPM-3300 Ser ies is a heavy duty 3-wire surveillance kit. The kit features a clear acoustic tube earphone with TWIST CONNECTOR for easy removal, plus a small, covert microphone which can be clipped to the user's lapel or shirt sleeve, and a separate barrel style PTT which is held in the hand. Show more