Checked works, warm. Now it's interesting how much power bank is enough, but apparently you need with enough capacity. I can not download the video, I have not learned yet. With the seller did not communicate.
With problems, but still the order received. The seller closed the order when it was not yet delivered. The track was not tracked. Opened the dispute as he stretched, the insoles were delivered. Quality expectation justified. Material and manufacture without comment, warm well. The length of the insoles is 27,5 cm, the width is 9 cm (ordered size 45).