- Variable output
- Visible indication (preferably digital) of voltage and current
- Short-circuit protection
Why am I happy with it? It's simple, it does what it's supposed to do, the adjustments aren't too twitchy, and oh my goodness is it nice to have in-line current measurement. It beats what I was doing before, when power came from a wall wart. Then, I'd occasionally put the VOM in-line, but more frequently would just hope. It's also nice to have clean power, versus whatever my wall wart was putting out. Oh, and did I mention that it handles short circuits gracefully (or claims to)?