Function: 1)Easy to install, can be easily transferred between different vehicles. It can be plugged into any 7-pin connector and wirelessly connected to a smartphone via Bluetooth, making the operation simple and easy. 2)This Bluetooth brake control can be easily transmitted between vehicles. Both output and sensitivity can be adjusted to achieve smooth and firm stopping. Provide a smooth and safe experience.<br><br>Bluetooth connection: that Bluetooth brake control 1 is installed and activated. Select Bluetooth brake control 1 on the mobile device. After the connection is completed, you can return to the . Attention: If the connection fails, please turn off the power and restart Bluetooth brake control When attempting to connect to a mobile device, if the connection fails multiple times, please copy the code of the fault result and contact us through the customer service of the mobile device. Color: Black Material: ABS<br><br>Package Contents: 1 x Trailer Connector<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.