Humminbird SmartCast RF35 means never having to guess if you're need a hot spot again... the answer is right on your wrist! Find fish and structure up to 100 ft in any direction of where you cast! The SmartCast RF35's sensor casts directly to a fishing rod for ultimate portability and simplicity. Use the SmartCast wireless technology to check out structure without wasting time piloting the boat to the actual location. You save time and make fishing decisions faster! And the information is all yours with a quick glance at your wrist. More: High visibility 1 1/4" diagonal display with 48V x 32H resolution pulse backlit display; Advanced Remote Sonar Sensor (RSS) with ultra-wide sonar coverage equal to twice the water depth... pulse lit design for night fishing; Sonar Coverage: 90 degrees @ -10db (115kHz); Water surface temperature and digital depth readout. Display powered by replaceable 1 Lithium 2450CR watch battery. (included); 150 ft remote operating range, 120 ft depth capability; Illuminated Advanced RSS with water surface temperature included; One-Touch menu navigation easily controls FishID+, depth range, fish alarm, and sensitivity; Advanced RSS typically lasts for 500 hours of in-the-water usage; Wet Switch technology maximizes battery life by automatically shutting down when the Advanced Remote Sonar Sensor is out of water; Waterproof design; Quality backed by over 30 years of fishfinding technology. Order Today! Humminbird RF35.More detail..