DC Power Supply, 30V 10A Bench Power Supply with Memory Storage & Recall，Variable Power Suppy with Encoder Adjustment Knob, 5V/3.6A USB Quick-Charge & OCP Short Circuit Alarm (0-30v 0-10a)

Great for testing radios and similar DC audio devices. Functionally perfect and well-designed and aesthetically pleasing. The green display is so much nicer than the standard red displays. My only change would be to be able to quiet the beeping when changing volt and amp settings, seems a little annoying. One thing to keep in mind before using the unit is to switch the input voltage in the back of the unit to 115V. For some reason it is set to the higher, foreign setting when you take it out of the box. This unit is far better than the inexpensive ones you can find out there. Spend a few bucks more and get a better unit like this one. I had a cheaper one that I returned that caused static on my radio testing and also emitted a high whine/pitch from within the unit. Overall, this is a great unit for most electronic DC requirements, 30V and 10A. For my purposes with old car radios I can set the volts at 13.75 and the amps at 5A, even though the radios only pull less than 2 amps. I set 5A as a ceiling to be on the safe side if there is an internal short inside the radio. Another good feature is being able to store multiple volt/amp settings for other types of requirements. I am extremely happy with my purchase, no regrets.

Am using this as a manual charger for maintaining automotive lead-acid batteries. Works great for constant current, constant voltage, and float charging…use of which mode depends on state of battery charge. As with any manual battery charging operation, one should monitor the charger and battery at all times.

I like all the features. Better than the one I bought a couple years ago, it was a different manufacture and no presets.

Easy to use, stable output, looks good on the bench.

This could be a decent power supply, but the fan comes on even at low wattage,. I bought this to power a low voltage mattress heater, but the fan kept me awake. I expect to hear the fan when I'm running it at 200 Watts to warm up the bed, but not when I'm running it at 30 Watts during the night just to keep the mattress from getting cold.