High-resolution 3.3" square, 240x240 pixel high-contrast Film SuperTwist LCD screen delivers superb sonar and mapping definition with excellent detail even in bright sunlight. Adjustable grayscale values programmable to user preference for best readability. Advanced cold cathode screen backlighting for high visibility at night and in low light. Multiple screen & keypad lighting levels. Depth penetration to 1000'. 3000 watts peak-to-peak transmit power. Internal back-up memory preserves sonar settings and GPS data safe and accessible for decades. High-impact cover protects screen and keypad when not in use. Sealed and waterproof. Full 1-year warranty.