Review on Dorhea LM2596 DC-DC Buck Converter Step-Down Regulator 4.0-40V To 1.25-37V DC 36V To 24V To 12V To 5V Volt Power Supply Module With LED Voltmeter Display Compatible With Car Motor Buck by James Davis

Voltage and current and full charge indicator. Main point I got these was for the current adjustment, to turn down for less heat on projects and testing works good. Form factors a bit large wish there was a smaller unit size is every thing when DIY projects. Also going to test if the full charge indictor stops the voltage flow for charging batteries ( would like to be able to walk away for coffee or other things and not have to worry)If so this will be worth the $