The tester is great but the software is useless. Once you activate the Bluetooth function you can’t get out of it unless you turn your phone off or deactivate the Bluetooth app. The tester says press exit to shut the app down but it turns back on by it self. The software / firmware does not work as described by it own menu. So if you want to just use the tester and not the Bluetooth you have to shut the app off on your phone or the tester won’t work. Useless software
