JB4 Bluetooth Wireless Phone, Tablet Connect Kit Rev 3.7 (PinnedPower or Separate Power)Wirelessly connect and control your JB4 with your phone or tablet! The JB4 Wireless Bluetooth Connect Kit (Rev 3. 7) allows your Bluetooth 4. 0 compatible Apple iOS and Android devices to connect wirelessly to your JB4 via the JB4 app. View critical engine data in real time, datalog, read codes, change maps, update settings, update firmware, and more, all wirelessly from the palm of your hand! The REV3 mounts next to the JB4 in the engine bay