Is it this thing? http://www.amazon.com/Sojing-String-Patented-Silent-Electric/dp/B00E4WAWLM

If so, there isn't any place to put your ring or pinky finger...yikes!

Regarding the sound, my guess is that there is a crappy solder joint in the electronics somewhere. Probably easily fixable.

Sorry that it's so crappy...

Looks like there are other out-of-stock brands such as the Jisheng 5 String Silent Banjoand the Sojing 5 String Silent Electric Banjo.