Bluetooth headset revenues grew at a healthy pace in 2020, driven by TWS headsets, mainly AirPods. Growth slowed in the year due to the COVID-19 pandemic, but the BT HS market remains a fast growing industry. Mono headsets are in steep double digit decline. Revenue growth is fastest in the stereo high- and mid-tier segments, but the ultra-low segment is also growing fast. The in-ear segment (tethered and TWS) has grown past banded and took the majority of revenues in 2020. This report forecasts worldwide Bluetooth headset revenues by type, region, for mono and stereo, from 2001 to 2025.