Click to expand Tap to zoom Soldering Kit | DIY Bionic Ear by Heebie Jeebies Sold in Units of: 2 Current stock: 153 Sale SKU HJ-0606 2 4 6 8 10 12 14 16 18 10+ Quantity Quantity Add to cart Solder your own listening device that allows you to listening to the quietest sounds using the principles of a directional microphone.