<https://gearsource.com/product/8011-hydrophone/#product>
<http://schema.org/description>
"DPA 8011 Hydrophone. Underwater recording microphone. This item is used. The mic has minor handling wear but has been used around 10 times. The mic is tested and is in perfect working order. The cable is attached and is 10m."
<https://gearsource.com/product/8011-hydrophone/>