The HYT TC-446S Earbud with in-line PPT & volume selector ESM07 was designed for users who engage in retailing, entertainment etc.
The HYT TC-446S Light-weight, single-ear headset with VOX ECM12 is a single muff headset with noise cancelling swivel boom microphone with in-line PTT and volume control.
The HYT TC-446S Earpiece with on-MIC PTT & VOX & transparent EAM12 was designed for users who engage in public security.
The HYT TC-446S Recieve-only earpiece with transparent audio tube ESS08 is for use with the remote speaker microphone and has a 3.5mm pin.
The HYT TC-446S Recieve only earpiece for SM08M3 – ESS07 works with any HYT speaker mic that has a 3.5mm earpiece jack.
The HYT TC-446S Compact remote speaker microphone ZSM2H is a HYT lapel speaker microphone with locking accessory plug.