Advanced Fish Detector Technology 2.2inch contrast Dot matrix FSTN LCD display stays readable in bright sun and dim light, helping you spot fish clearly at any time of day. Impressive Depth and Range Depth capability up to 135 feet (45 meters) and a wireless operating range of 493 feet (150 meters) enable you to reach deeper waters and cover larger fishing areas without losing signal. UserFriendly Features Selectable sensitivity, zoom options, depth range, and alarms for both fish and shallow water help you tailor performance to conditions. Builtin memory preserves sonar data when the unit is turned off, allowing you to review settings and findings later. Durable and Waterproof Design Level4 waterproof (spraywaterproof) construction for use in challenging environments, including night fishing and ice fishing. Use scenarios Openwater or largearea fishing: Use the long depth and wide wireless range to locate fish zones and cover a broad area efficiently. Night or lowlight fishing: Rely on the contrast display and alarms to monitor activity without constant screen attention. Ice or coldweather fishing: The waterproof design and robust performance support use under spray and chilly conditions, with memory retention for later review.