DROK 0.96 Inch Portable OLED Multifunction Tester DC 0-33V 0-3A 0-99h59min 0-99W Time Temperature Current Voltage Power Capacity Energy 7in1 Electrical Parameter Tester Meter Panel

Installed this in my bench 3amp power supply to replace the sticking analog voltage meter. Had to make an adapter filler plate to make it fit in the old meters hole. Only thing to be aware of is that current is measured by a lifting the ground leg and connecting to a shunt in this meter. Thus if you have a multiple voltage power supply with all common grounds, you potentially could have current bypass this meter and not be measured if your circuit used multiple voltages from this supply. As far as I can tell all common digital current meters measure current through the ground leg so they are no different than this one. Otherwise I like this meter although the digit size could be bigger.

Great product. It's a bit small, but for the price I don't think that's a valid complaint. Functionally, it does everything it says it does, and it's pretty accurate as well, according to two separate DMMs I tested it with. I wired this (the 7-in-1 multimeter version) up to a 750mA battery charger, just to give me some feedback on what voltage and current the charger is putting out at any given time. As a bonus, it also lets me keep track of exactly how long the charger has been on and how many Ah the charger has theoretically transferred into the battery (although, of course, batteries are not 100% efficient at storing the energy you put into them when charging, so that really only gives an upper limit). I also love that the display can be powered by anywhere from 4VDC to 20VDC, which meant that I could just pull out a random wall wart from my big box of abandoned wall warts, strip the wire ends and hook it right up. No need to go hunting for one with just the right voltage output. I will likely be buying more of these in the future.

Really nice and works well

Good product