Humminbird Advanced Mobil Station Smartcast Series RF15 406350-1: * Display size: 3.88" diagonal * Display pixel matrix: 160V x 132H * Display type: FSTN LCD * Display colors/grayscale: 4-level grayscale * Single beam * Sonar coverage:125 kHz/90 degrees at -10db * Wireless Range: 100" * Temperature: included * Backlight: yes * Waterproof: yes