ZKTeco D0BPA Guía Rápida página 9

Feature Settings:
Music: Press the Music Button once to change the default
music, the indoor chime offers four different kinds of music
for options.
Volume: Press the Volume Button once to adjust the
volume level, which supports four levels of 110dB, 100dB,
90dB and 80dB.
Settings: Press the Settings Button once to enter or exit the
pairing mode, or press and hold for 5 seconds to restore the
default factory settings.
8