Built into RAM 1500, the cup sometimes loses suction power. The weight of the tablet resting on the dashboard is still enough to alternately slide left and right. So I was forced to use a sticky rubber band on the bottom of the tablet to give it more friction to keep it from slipping and tearing off the suction cup. It looks good and now it does its job, but only after minor improvements. DEF does not have the power to support a suspended tablet. However, it works when the bottom of the tablet rests on the dashboard.