Bang & Olufsen Beoplay M3 Guia De Inicio Rapido página 18

Basic operation
EN A Volume switch Press +/- to increase/decrease volume.
B Press During standby, press the Connect/Join button to
join existing multi-room groups. If no groups are available, the
last connected source will initiate (Bluetooth). During audio
playback, press to pause/play. Double press to switch source.
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