Not sure why someone commented that these are a "podiatrists nightmare" and youre better off going with uggs. When you plug it in it will start blinking wait until all four light stops blinking before you can unplug it and it is fully charged. in you own unique way and so much more as part of something much bigger. I plugged into surge protector and placed iPhone, Apple watch and it worked! and use a magnifying glass to look for any imperfections. It doesnt seem to affect record placement accuracy. These are ok not what I was expecting. I use a Trek bicycle, and the pocket for misc items is where I keep the multi-tool (also by this company) the weight of the tool in the base sometimes shifts and makes the whole bag slop sideways- make sure to center it and add some type of wedging material over the frame and this does go away- just the velcro isnt effective no matter how tight this is. The material is sturdy. I ordered this for my son and he loved it!