E-Tuner is Edelbrock's exclusive Android app for the E-Street 2 and Pro-Flo 3 EFI Systems. E-Tuner communicates to your ECU via Bluetooth, so you can manage and Live-Tune a variety of ECU settings such as Air-Fuel Ratios, Ignition Timing, or Idle Speed, as well as monitor engine and sensor data in real-time with vivid graphic displays from your Android Phone or Tablet.