User Manual

BTHF304 User Manual
. 18
Warning:
Interrupting the upgrade process, such as lost of power, USB cable disconnection may cause unrecoverable
software errors in your handsfree and the device will fail to work. You may have to return the product to the
vendor for software recovery. Before upgrading your device software, please ensure that your device has
enough battery power, the USB cable has been firmly connected to both your PC and your device, and the
software execution on your PC will not be interrupted.