SPM-3300 Series 3-Wire Lapel Mic Kit w/Twist Connect Acoustic Tube Earphone. 3-wire Kits have separate PTT & Mic units for COVERT/DISCREET use. The SPM-3300 Kit Includes Bud and Semi-custom Ear Mold.
Fits many HYT models including: TC-1600, TC-500, TC-600, TC-610, TC-620, TC-700, TC-700EX
Very similar to the Motorola 2-pin except this one has a screw to lock it in place.
