SUNDELY Covert Acoustic Tube Headset/Earpiece for Motorola Radio MTH600 MTH650 MTH800 MTH850 MTP850 MTS850 Covert Acoustic Tube Headset/Earpiece for Motorola Radio 1-pin, Hidden mic in PTT button, 1 spare earbud included MTH600, MTH650, MTH800, MTH850, MTP850, MTS850