See™ (Sonar Echo Enhancement) Technology is more sensitive to fish, thermoclines and structure. Choose either Selective Fish ID+ that filters out false fish returns of Fish Arches Presentation. Water surface temperature included, speed capable. 4-1/4" high definition 240x160 LCD with UltraBlack LCD pixel technology and 12 swivel mounting system with one button release. One-touch zoom view instantly enhances bottom detail to show fish from structure. X-press Menus for instant access to the most important features. Angler Profile Presets configure options to fit your personal preferences. Ultra-fast sonar and display scroll speed capability delivers the maximum information on-screen. Depth capability: 600'. Versions Available: 5022979: Standard. 5022991: Portable with temperature. Utilizes Humminbird's rugged portable case with power from 2-6V lantern batteries.