Now using an iPhone iPad Mac or Android on stage for set lists and sheet music just got a lot easier rig Blue Turn is a Bluetooth page turner with backlit pads that easily lets you turn pages and scroll through material hands-free. If you'd like to streamline the page turning process for your sheet music lyrics slides tabs and other documents rig Blue Turn is the answer. rig Blue Turn is a compact Bluetooth page turning solution for iPhone/iPad Mac and Android that lets you use your feet to set your hands free while performing. It comes with two highly visible backlit soft-touch buttons that you can trigger with your feet to turn pages leaf through lyrics scroll slides and more in your favorite apps and software.