Truck Door Minder was designed to help business owners along with fleet managers to reduce cargo loss. In todays market it is vital to be sure everything is being done to make sure product is delivered on time and without damage. We all know what happens when the rear cargo door is left open, product loss, delayed delivery, time lost, redo paperwork, reproduce items damaged, reload truck, back out for delivery and lets not forget customer feed back. Then there is also the liability issues that can arise if someone on the road is injured from your product falling out. Truck door Minder Works for you to eliminates this from happening using Bluetooth technology to communicate with transmitter and receiver it notifies the driver of the status of the door with beeper notifications and visual light. With our Patented design it works with or without the key in the ignition. Comes with free Android and Apple app.                                                      PATENTED US 10,217,347