SP200 SonarPhone T-Box Permanent Mount Package Dual Beam Wi-Fi Fish Finder Technology That You Can Share With Friends. The SP200 Permanent Mount System is designed for installation on boats with easy access to a 12 volt power source (not included). As the name implies, SonarPhone turns your smart phone or tablet into a fully functional sonar system that will rival any high end sonar on the market today. Using patented WiFi signal technology to transmit to smart phones or tablets. You do not need cell phone coverage to use it, the SonarPhone will work anywhere in the world. The SonarPhone T-BOX creates its own WiFi hotspot and you can share your signal with as many people as you like, the App software is downloaded for free from the App Store or Google Play and works with both Android and IOS systems. With the powerful SP200 T-Box system, you can reach depths of 240' with a dual beam (20/40°) 200kHz skimmer-style transducer and temperature sensor. The skimmer-style transducer can be mounted externally on the transom of your boat for high speed use or internally on fiberglass hulls, but you will lose the temperature sensor option for in-hull installations. Additionally, a 12V car plug/USB adapter is included in the SP200 package to power your tablets or recharge your phones. Features: Compatibility: iOS 4.3 (iPhone, iPad) and Android 2.0 Free App Download Auto Ranging Water Temperature and Depth Indicator Audible Alarms for Fish, Shallow Depth and Low Battery Fish Icon Zoom Bottom Track Noise Rejection Surface Clarity Battery Indicator 1 Year Warranty