abcGoodefg Covert Acoustic Tube Headset/Earpiece Police PTT Mic for HYT (Hytera) Talkabout Radio Walkie Talkie TC310 TC320 TC1600 TC1688 MH230R MD200R MR350R MS350R 1-pin (1 Pack) Covert Acoustic Tube Headset/Earpiece Police PTT Mic for HYT (Hytera) Talkabout Radio Walkie Talkie 1-pin, Hidden mic in PTT button, 1 spare earbud included TC310, TC320, TC1600, TC1688 Excellent for use in police, military, nightclubs, bars, paintball, security, restaurants, hotels, bouncer, warehouses, and noisy environments.