Sena Bluetooth SPH10 v4.2 User's Guide - Manual (Page 19)

SPH10
20
Rotate Jog Dial
Tap Phone
Button
Tap Jog Dial
VOX Phone Enable Disable
VOX Intercom Enable Disable
Voice Prompt Enable Disable
Delete All Pairings Execute N/A
Exit Configuration Execute N/A
Voice Configuration Menu & Button Operations
10. FUNCTION PRIORITY
The SPH10 operates in the following order of priority:
(highest) Mobile phone, Intercom,
Stereo music by audio cable
(lowest) Bluetooth stereo music
A lower priority function is always interrupted by
a higher priority function. For example, stereo
music is interrupted by intercom call, and intercom
conversation is interrupted by incoming mobile
phone call.