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 $
DC/DC 12V To 24V Boost Converter 40A 960W - Waterproof Voltage Regulator Module For Car Power Supply (10V-16V Input)
15 Review
Kohree 36V To 12V DC/DC Converter Regulator - 10A 120W Golf Cart Voltage Reducer
17 Review
EXuby Digital Converter Box For TV With RF/Coaxial And RCA Cable For Recording And Viewing Full HD Digital Channels Free (Instant Or Scheduled Recording, 1080P HDTV, HDMI Output, 7 Day Program Guide)
12 Review
HOMELYLIFE 600W High Power Voltage Reducer DC 48V 60V 72V Step Down To DC 12V 50A Buck Converter Waterproof Module Car Truck Power Regulator Transformer
12 Review
Portable Headphone Amp With 3.5Mm Stereo Audio Out, GAIN Support & Lithium Battery - Compatible With IPhone/Cellular Phone/MP3/MP4 /Computers.
27 Review
Premium Harman Kardon AVR-154 Home Theater Receiver - Discontinued by Manufacturer
11 Review
Neoteck Portable 3.5Mm Headphone Amplifier With Bluetooth 5.0 Receiver, Two-Stage Gain Switch, 16-150 Ohm HiFi Earphone Amp, Aluminum Matte Surface
34 Review
Amp Up Your Audio Experience With The Aimpire AD10 Mini USB DAC CSS XMOS XU208 ES9018K2M OPA2134 Audio Amplifier Decoder
10 Review