The light is very bright and has like 16 program modes for different light patterns and has a long cord for plug in power!
The base has strong magnets, with a pair of suction feet, that really don't suction, they just protect your paint.
I'd say it stays pretty good with the magnets that came on it! Truck took a tumble through a pole and it didn't move!
Mounted this on my ATV for when I'm out plowing. Always feels a little dangerous near the road even with the headlights and taillights on. There just aren't a lot of lights on the side of an ATV. Backing up to the road now I know I'm being seen. Routed the cable under the seat for a nice clean install.
This light is perfect for protection from traffic if you are moving snow across the road or it warns drivers to slow down as there is slow moving vehicle in the road and to be cautious.