Featuresr dot matrix lcd display with white led backlight adjustable brightness for easy reading at night or under weak lightr update the detected underwater information in time display water temperature and depth fish location bottom contour detector sensitivity and battery strengthr accurate detection depth ranges from 06m to 36m 2 118ftr audible fish and depth alarm clear fish icon displayr wireless sonar sensor transducer wireless operating range reaches 80m 125khz sonar fre