Connect wirelessly to iPad, iPhone, or Mac. The microKEY Air supports Bluetooth Smart Apple Bluetooth Low Energy MIDI. With an average of one hour of use per day, the batteries allow approximately one month of operation. And best of all, the microKEY Air runs on just two AA batteries. MicroKEY Air can also be connected via a traditional USB cable. Since the microKEY is USB bus-powered, you only need a single USB cable to connect it to Mac or Windows. There's no need to install a driver; just connect it to your computer and start playing.