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Brake control monitoring has never been easier! Simply plug in the Echo brake control device into the standard 7-way RV blade socket at the rear of your vehicle and let your phone be the brake control monitoring unit. Download the app to see any settings, status updates, and activity. With nothing beyond the plug-and-play component, this device is easily transferred between vehicles and you can even keep track of different vehicle profiles within the app. The Echo brake control uses a triple-axis motion-sensing accelerometer that produces smooth and safe stops.