The CURT Echo Bluetooth Brake Control, No. 51180, is a portable, plug-and-play device that links to the driver's smartphone to control and monitor all trailer brake activity. With the downloadable Smart Control app for Apple and Android phones, the Echo monitors the trailer brakes, allows for manual control and sends status updates, all using the driver's smartphone. The Echo is also designed to be highly portable for use with multiple vehicles and trailers. It easily plugs in between the 7-way RV blade connectors of the vehicle and trailer. The app is able to store multiple user and trailer profiles, and the device itself is constructed for long-lasting weather resistance.