Yobett Black Carbon Steel C-Clips External Retaining Ring Circlips for Shaft Assortment Kit Metric M5-M25 150pcs Pack Set 15 Sizes

I ran a few quick tests, pulling up to just 0.4A from the source @ 5.1V. No problem. Left a battery connected to the output while disconnecting the input voltage, no issue. The screw terminals don't work with very small gauge wire (finer than 22 stranded), but are otherwise acceptable. The pot adjustment works well, with good control of a hundredth of a volt; although I didn't test it below 11v or above 19v output, yet.I plan to update this review after additional testing.

It is great exactly as advertised everything is the way it was supposed to be works perfectly

Very easy to use. I like the screw connectors. I connected it to a 12V battery and adjusted the output to 24V. The voltage display is nice to have. I measured with a DVM and it was right on. Perfect for what I needed.

This worked great for boosting the voltage to a samsung security camera over 1500' away from my house. Definitely will be buying more. Being able to see the voltage on the unit while adjusting is well worth the extra money.