ReelSonar Wireless Bluetooth Smart Fish Finder Patented sonar fish identifier technology LED beacon Rechargeable battery and charge status indicator light 10+ hrs battery life.Syncs with iOS (Apple) 10.0 and later operating systems and Android 4.3 or later that use Bluetooth Smart (4.0) Accurate sonar readings down to a depth of 135' 2 Snap swivel connections for use as bobber or as remote fish finder Free app on iOS and Android Bluetooth Smart sync up to a distance of 100' for best battery life on the market Choose between raw sonar or fish tagging views Depth-tagged fish icons color coded by size Waterbed and structure contour mapping GPS spot tagging with interactive map Trip Log with date, time, location, water temp, conditions, type of fishing, lure, number and species of fish caught Lunar calendar and weather (temp, rain, wind, barometer) Fish & strike alarms Optional social media share features Trip and spot logging, weather, and lunar calendar app functions available w/o iBobber hardware Compatible with Google Watch and iWatch Refer to the manual below under the product description for more product use information, installation instructions and troubleshooting steps.