The Gourd Amplifier from Mountain Melodies Manufacturing was born after the company owners, Paul and Sue Bergstrom, found themselves with lots of kettle gourds laying around and thought “Why not?” Each amp has its own unique shape and sound. You can use it with instruments or to play music from your MP3 or smartphone. It runs off a 9-volt battery (not included), so it is totally portable, and connects to your music or instrument via a 1/4″ input jack only (no Bluetooth here).