It's come to my attention that the adapter is a
European adapter, which come with two prongs. As I live in North America, our adapters come with two flat-end prongs instead. So, when I finally settle on a BlackView phone that works with US Cellular carriers, I can buy a European to US prong-adapter such as this one, to plug it into my surge-protector:
https://www.amazon.com/dp/B0019DERAG/?c ... _lig_dp_it