Worked very well. Would buy again

I mean for this price what do you expect

Advice for buyers: short both output pins to adjust the Constant Current value.

Advice #2: don't forget the diode if you're gonna be connecting the output to a battery which can potentially deliver more voltage than you set on the device.

Both units had defective potentiometers, I bought one and they sent me a second with the same problem. Works ok if you replace the pots yourself, but still not great.