New MaximalPower Replacement 2-Pin Earpiece (with screw): 

HYTERA Clear Coil Earbud Headset

Works with:

Hytera (HYT):

• TC-500, TC-508, TC-518, TC-580
• TC-600, TC-610, TC-620
• TC-700, TC-700EX, TC-700ExPLUS
• TC-900
• TC-850
• TC-1600
• TC2100
• TC-3000
• TC-3600
• PD-502, PD-562

Replaces OEM parts:

• H1 (Hytera 2-Pin w/Screw)
• Replacement Earmold Earbuds for Two-Way Radio Coil Tube Audio Kits.
• Medium Size (Regular size that Fits ALL).
• 1-Pair (Left and Right) Earmold. 100% Compatible with original manufacturer equipment. Fits most 2-way radio headsets.