Cal Amp 4230 Programming Manual page 9

Note​ : The app automatically disconnects from the device after attempting connection for 1
minute and 30 seconds without receiving any data from the VBUS device.
○ After a successful VBUS connection, You should hear a tone letting you know
that device is now connected.
○ To check if you are connected, go to the Android Notification Bar and you should
see the following message.