SPM-1700 Series Skull Microphone Headset. Attaches to Hardhats. Microphone presses down on top of head, large speaker hangs over one ear. Kit includes Round (Hockey Puck)Tactical PTT switch. Finger-Tip PTT and Junction Box UPGRADE Available for extra charge ($35 MSRP).
Very similar to the Motorola 2-pin except this one has a screw to lock it in place. Fits many HYT models including: TC-1600, TC-500, TC-600, TC-610, TC-620, TC-700, TC-700EX
