The outlet has a high IP rating, making it resistant to rain, bad weather, and dust,
when the lid is on. The USB outlet has a maximum output of 5A regardless of whether both
connections are used or just one – a standard USB outlet typically has 1A + 2.1A.
The mounting nut makes installation easy and smooth, especially in tight spaces.
The nut has ""notches"" which allows it to be tightened with a standard screwdriver
if it is difficult to reach by hand.