Cllena DC 12V 24V Step Down to 5V 20A 100W Converter Voltage Regulator, Waterproof DC/DC Buck Transformer Power Supply

so I got this DC DC converter off Amazon I just want to post review on how well it performs it's under 20 bucks I think I got it for 17 dollars or so and so it's the next Tron next trucks however you say it's DC DC converter its rated from looks like a nominal input of 24 volts says he can go anywhere from 12 to 40 and your output is 12 volts at 20 amps max it looks like it's sealed fairly decent although this looks like a rubberized coating it's not true plotting material it supposed to be weatherize so it will having problems in a rain hopefully let's I want to run a bunch of tests on this and see what it's going to do and my voltage conditions low voltage conditions low current I current see what the ripple is on the DC DC converter and what its efficiency is so those are the tests I'm going to try and run on this I'm going to use this Sorenson DC 2 DT I'm sorry Sorenson power supply