For people who struggle with depth perception, or for those who drive larger vehicles, parking in their garages can be a problem. The Park Zone PZ 1600 Precision Parking Aid can help you consistently position your car exactly where it needs to be, every time. The two-part unit uses two AA batteries and consists of a sensor and an indicator with green, orange and red lights. Both are attached to your garage wall. Once calibrated, the indicator remains green until you’re about eight feet from the desired spot, when the orange light begins to glow. Once in the correct position, the red light comes on. Order one for $20 from www.amazon.com.