The portable Curt Echo Mobile 7-Way Trailer Brake Controller Connection uses Bluetooth connection to let you control all your brake settings from your smartphone. Easy to transfer between vehicles, this brake controller makes it easy to monitor braking activity in any vehicle. Plug-and-play installation uses 7-way connectors for tool-free application. The triple-axis, motion-sensing accelerometer delivers smooth, responsive stops. Multi-color LED for power, trailer detection, and wireless connectivity makes it easy to monitor at a glance, plus this device stores multiple vehicle-trailer profiles. Sealed circuit board is protected from the elements, while a retention strap and locking tab keep a firm connection. Free app is available for both iOS and Android, while automatic calibration takes the hassle out of setup. The Curt Echo Mobile 7-Way Trailer Brake Controller Connection is compatible with low-volt, PWM, ABS, cruise control, and electric over hydraulic. Integrated reverse-polarity and short-circuit protection adds safety. Mfrs. limited lifetime warranty. Bluetooth connection lets you control brake settings on your phone Portable design is easily transferable between vehicles Tool-free plug-and-play installation with 7-way connectors Responsive triple-axis, motion-sensing accelerometer Multi-color LEDs for power, trailer detection, and wireless connectivity Sealed circuit board is protected from the elements Retention strap ensures a secure connection Free app for both iOS and Android Auto calibration