The Dry Guy Circulator is a big long boot dryer that is 2 inches longer than the AC/DC dryer but it has one weakness.
You can’t use it in the car without your own adapter. It’s for wall outlets only which is a bit of a shame because it’s just the right length. If you want a portable boot dryer for hotel rooms and places you are crashing at then these will be perfect. It’s not a super fast dryer but if you leave them in over night it will dry up a boot that has a 8:30am to 4pm days worth of sweat. It will also be nice and warm when its time to put them on.