SONAR: Easy-to-read sonar Pair with free app to stream and view sonar on Apple(R) or Android(TM) mobile devices Sonar connects and streams wirelessly up to 200' Built-in GPS lets you create your own Quickdraw maps with 1' contours Displays sonar on a simple phone app interface To make using sonar even simpler, turn on fish icons to view graphic images of fish targets and their depth readings, so you'll know exactly where to drop your line FEATURES: Quick and easy set up 10+ hours of rechargeable battery life Works in freshwater or saltwater Durable, lightweight sonar device is built to last and easy to cast, using a 20 lb test weight or higher fishing line Automatically powers on when it's floating in water - and turns off when it's not ADDITIONAL DETAILS: Download the free app for your Apple or Android smart devices. Pair it with the STRIKER Cast sonar unit