I guess you could also say it's like a normal QI wireless charging pad that happens to have a 4800 mAh capacity battery inside.
I know others have referenced the product a few times. Here's a video with it in use.
My wife continues to use the power bank in the car and when we're walking our daughter around the neighborhood. It's held up pretty well.
Current price is $56.99 on Amazon w/ free shipping.