BTU Module. The Naza-M now provides assistant software for iPhone4s, iPhone5, iPad3, iPad4, iPadmini, iPod5. You can do parameter adjustments at any time on your mobile devices, using only the BTU with a built-in Bluetooth module which makes it easier and convenient. It uses low power Bluetooth to minimize the power consumption of your mobile devices. It is easy to use and will automatically save your last connection records. The password mechanism ensures your safety link. Parameters can be automatically synchronized to the Cloud Server and can be restored immediately when you changed your mobile devices.