https://drive.google.com/open?id=1WV6c_pbcHDdOx2aTtfPvv54ZddaIClZW


Specifications
  • Heart-shaped epoxy cover: waterproof, pressure resistant

  • Water resistant to 100 meters
  • Designed for the marine environment: reliable, durable and anti-fall
  • Encrypted messages increase their security

  • Flashing function is easy to search at night