What Im enjoying is that when you turn the volume down, the bass doesnt go away! I think Google pay or other wallet apps would work regardless but I am unsure, do not quote me on this! Cheers to comfy swimming shoes! Once on, they are very comfy and well made. I have pretty big feet (size 15) and they fit the length of the toe as well, but they do say you can cut them down to size. Ive used batteries from 2ah to 5ah and doesnt matter they will run all day, have yet to run a battery dead in it even after multiple long hour uses spread over a work week, always seem to have to steal battery for another tool before it dies, the sound is great to me no complaints there definitely loud enough to fill a whole basement/house or shop with sound, great for all uses. I took a few painful steps, took them off, and returned them. I used the 3M Velcro that has the removable sticky (you can see it in the picture) so I can move/remove the LED later. Im not sure about the quality of the metals and I will update. und ich habe schon einige andere Modelle schon gehabt.