Easy to install and transfer between different vehicles. Plugs into any 7-pin connector and connects wirelessly with 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 braking experience. Bluetooth connection: Install and activate the Bluetooth brake controller. Select the device on your mobile phone. Once connected, you can return to the app. Advanced responsiveness: Equipped with a three-axis accelerometer for smooth and responsive braking control. Operates even when your smartphone is locked, during a call, or if the Bluetooth connection is temporarily interrupted. Name: Trailer Brake Controller Note: If the connection fails, turn off and restart the Bluetooth brake control. If connection fails repeatedly, note the error code and contact customer support. Color: Black Material: Plastic Package Contents: 1 x Trailer Brake Controller Only the items listed are included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.