This trigger will fire when you press the volume up or down button on the device. In most cases the trigger will only work when the screen is on (Monitoring volume changes works with screen off if the device is awake, eg. when playing music). | This trigger will fire when you press the volume up or down button on the device. In most cases the trigger will only work when the screen is on (Monitoring volume changes works with screen off if the device is awake, eg. when playing music). |