Forklift impacts can cause major problems for pallet rack, even leading to a major failure. This forklift-mounted sensor helps drivers stay aware of objects and pedestrians behind them by using light signals and an audible alarm. Within 16' of an obstruction, red LED lights in the cab flash slowly to alert the driver. Within 10', they flash faster. And at 6', they stay on continuously and an audible alarm sounds. It's powered by the forklift, so you won't have to worry about charging the unit.