Is this charger original? It is written low standby below normally I have seen that there is nothing written, It's also mentioned in the side of the adapter instead of energy efficiency. Bought it from Flipkart.
use jbl 310c type c earphones they are supported. It's a bit cheaper compared to samsung akg type c earphone Or you can try Apple type c earphone, samsung akg also, If a type c earphone has DAC Support they will work