Bluetooth headset revenues grew by a healthy 122% in 2019, driven by TWS headsets, mainly AirPods. In 2020 the growth will slow down due to the COVID-19 pandemic, but BT HS market will still be one of the fastest growing industries. Mono headsets are in steep double digit decline. Revenue growth was fastest in the stereo premium segment, but the ultra-low segment is growing fast. The ultra-low segment will grow rapidly in 2020 and beyond. The in-ear segment (tethered and TWS) has grown past banded and will take 81% of the revenues in 2020. This report forecasts worldwide Bluetooth headset revenues by type, region, for mono and stereo, from 2001 to 2025.