Jiayouy Pickup Piezo Transducer, 3 in 1 Piezo Contact Microphone Pickup for Electronic Acoustic Guitar Violin Ukulele

I couldn't recommend these enough. I took the time to remove the adhesive with pure rubbing alcohol, and then glued them to the inside of my inexpensive classical guitar with gel CA glue. I used the opportunity to add a strap (reusing the output jack) and a separate pin i bought. These sounds really good, at an unbelievable price. You certainly NEED an external DI or acoustic pedal, something powered that matches impedance and makes it work MUCH better with an acoustic amp or audio interface with the best possible sound. Installation was not trivial, since there was drilling and testing involved, but it was not supposed to be in.

Easy install , sounds natural. No batteries needed.

The Mic type was not a good choice. A Piezo Pickup picks up all sounds even touching the instrument. I would be better off with an actual electronic pickup as there is no way to reduce the sounds it will make just touching it with your body or hands. It does amplify sounds just all sounds not just the strings like on a Acoustic Guitar Pickup. You can even get a wireless one for the airhole.