2-step release button. Push & release to adjust. Push & hold to roll up. Heat alert! White hot heat alert. Patented system indicates when car is too hot! An easy-to-use, retractable car shade that blocks the sun and lets you know when the car interior is too hot - because a crying child can be dangerously distracting when you're driving. It's the little things. Stuff You Should Know: Easy-to-use, 2-step release button. Just push and release to adjust, push and hold to roll up. Vinyl shade blocks the sun's glare and protects from UV rays. Suction cups attach to car window to prevent damage to cap upholstery. Suction cups cannot be removed so there's not choking hazard.