I know that a lot of people have trucks that they want to look like its a overland or other work truck. I love charging my phone on this. However, in this model, the strap is quite wide and loose. My advice to others is go with what the child normally wears because the size chart is wrong. I think the battery has a 12mile capacity and we are definitely getting that if not slightly more. Tienen buen tamaño de la abertura del zueco para deslizar el pie al ponérselas o quitárselas, pero con suficiente cobertura del empeine para no andar chancleando. I would return them, but its past 30 days. Great for on deck and around the pool! 5 mm stereo output to provide the capability of hooking up another speaker. We both are able to find a comfortable setting on the adjustable seat.