Here's why you need an adapter
The outlet and plug type used in Lesotho is M. Take a look at the picture below to see what this plug type looks like.
Voltage and frequency American Samoa vs Lesotho
All outlets in American Samoa provide a standard voltage of 120V with a frequency of 60Hz.Voltage: 120V Frequency: 60Hz
All outlets in Lesotho provide a standard voltage of 220V with a frequency of 50Hz.Voltage: 220V Frequency: 50Hz