Czech Post delivery to me. Delivered in 13 days from order. Packed well. I am satisfied with the goods as well as with the seller and delivery. It seems to work well. Mode switch and ON-OFF button works as described. Charging looks good (no overcharging and reduces current before completion). It can be used as a battery source for some Arduino projects (a several I tried and it works). I must test the protection against overdischarge (what is the value) if it exist, is not stated in the description. The seller should provide more information in the description. It is also not known function of the Button is on the back and what kind of button is suitable for it. A little advice for some if the module seems dead, connect the charging for a while and then disconnect ;-) I will tests more later.
working as described, fast shipping.