Easy to install and transfer between different vehicles. Plugs into any 7-pin connector and connects wirelessly to your smartphone via Bluetooth for simple operation. This Bluetooth brake controller allows adjustment of output and sensitivity for smooth and firm braking performance. Provides a smooth and safe towing experience. Bluetooth connection: Ensure the brake control is installed and powered. Select the device on your mobile phone's Bluetooth settings. Once connected, return to the app interface. Advanced responsiveness: Equipped with a three-axis accelerometer for smooth and responsive braking control. Operates reliably even when the smartphone is locked, during calls, or if the Bluetooth connection is temporarily interrupted. Name: Trailer Brake Controller Color: Black Material: Plastic Package Contents: 1 x Trailer Brake Controller Note: Light reflection and display differences may cause slight variations between the color shown and the actual item. Measurement may vary by +/- 1-3 cm. If connection fails, power off and restart the brake control. If connection issues persist, record the error code and contact customer support.