Augeny Car Dashboard Phone Holder, Non-Slip Double-Groove Auto Cell Phone Pad Mat with Number Plate, Universal Vehicle Phone Mount for All Smartphones, GPS Devices and More (Geckos)

The car dashboard non slip phone holder is an excellent product. Although Im still not sure what the numbers are for, the actual phone holder is very useful for keeping my phone steady while driving the bus. I like the thick rubber grip on the phone holder that provides a non slip experience. My phone fits in either one of the grooves without taking off the case. I can also use two phones in the holder and it will still remain steady and not fall off the dash.