TriFlex Trailer Brake Controller by CURT
http://goo.gl/13zVbo

TriFlex brake controller detects every motion of your vehicle and trailer and automatically adjusts brake output when going up or down a hill.
It manages up to eight brakes at a time and is equipped with tripleaxis motionsensing accelerometer, compact size and a digital display.
CURT TriFlex trailer brake controller is compatible with antilock brakes and cruise control. It is easy to install, requires no setup and comes with a limited lifetime warranty.

All CURT products
http://www.carid.com/curt/

Brake controllers at CARiD.com
http://goo.gl/50PxNB