https://www.classichydrophones.com/product-page/contact-hydrophone-brda
Our classic, waterproof mono contact hydrophone is handcrafted with only the finest quality components. Produce audio recordings with its oxygen-free OFC...
hydrophonebrda
https://natakoaudio.com/product/weight-hydrophone-mount/
A Weight Addition accessory for Natako Audio's Hydrophones, designed to "Drown" the hydrophone for various applications.
weighthydrophonemountnatakoaudio