Garmin Striker Cast - Castable sonar that works with a smartphone - YouTube
Amazon.com: Garmin Striker Cast, Castable Sonar, Pair with Mobile Device and Cast from Anywhere, Reel in to Locate and Display Fish on Smartphone or Tablet (010-02246-00) : Electronics
Amazon.com: Garmin Striker Cast, Castable Sonar, Pair with Mobile Device and Cast from Anywhere, Reel in to Locate and Display Fish on Smartphone or Tablet (010-02246-00) : Electronics
Amazon.com: Garmin Striker Cast, Castable Sonar with GPS, Pair with Mobile Device and Cast from Anywhere, Reel in to Locate and Display Fish on Smartphone or Tablet (010-02246-02) : Electronics