This earpiece is compatible with HYT TC446S, TC518, TC610, TC620, TC700, POWER446. SPEAKER MIC & G-SHAPE EARPIECE FITS HYT TWO WAY RADIO TC610 TC620 (RS-ACC-M1S). This Speaker Mic has an overall cable length of 60cm with a curly chord and the length of the listen only G-Shape earpiece is 30cm.
eBay