This ultra-light earpiece has a microphone and in-line Push-to-Talk feature.
Commercial series earbud with in-line microphone/PTT/VOX switch
The Mag One - PMLN4557 is a commercial series over-the-ear receiver with an in-line microphone/PTT/VOX switch.
Mag One Earbud with inline microphone and push-to-talk
Replacement ear cushions for Motorola's flexible ear receiver.
D-style receive-only earpiece with 3.5mm plug.