Garmin Striker Cast Castable Fishfinder Sensor No GPSMeet the Garmin STRIKER Cast Castable Sonar Device a compact, castable fishfinder that streams real time underwater views directly to your iOS or Android device. With no GPS, it delivers focused sonar readings you can interpret at a glance, making it ideal for anglers who want portable, straightforward sonar on any water. Castable wireless sonar: Cast out up to 60 m (200 ft) and view live sonar on your phone or tablet via the Garmin app. No GPS