Get your alerts with Bluetooth! The TPX Bluetooth Transmitter wirelessly syncs with a Bluetooth system. It is compatible with Cardo Scala Rider, Chatterbox, Interphone, J&M, Schubert, Sena, and most other Bluetooth systems. It also works as a Bluetooth Receiver. You can use it with earphones and listen to your iPhone 7. Item comes with USB charger. To power directly from bike pair it with the TPX 12V Bluetooth Power Supply. This can also be used to wirelessly transmit music and sound from MP3 players, cell phones, and other audio devices to your Bluetooth system. Note: Some Bluetooth systems are only able to pair with one device (e.g. radar detector). If you are using this transmitter to communicate with more than one device (e.g. radar detector and cell phone), contact the manufacturer to confirm that it will work properly for your application.