More gadgets like this: here
Here is a Bluetooth connected tool that combines with your smartphone to let you apply smooth, safe braking. The Echo Mobile Trailer Brake Controller uses a triple-axis accelerometer to get the job done. It plugs into any 7-way connector and can be moved from one vehicle to another easily.
You can use the companion app to monitor all brake settings and calibrate. The device also sends you notifications if the trailer becomes overloaded.
Disclaimer: *Our articles may contain affiliate links. Please read our disclaimer on how we fund this site. As an Amazon Associate, we earn from qualifying purchases.