The Lucky LuckySmart Wireless Fish Finder LH-1B is a wireless fishfinder that can display the position and depth of approaching fish. When the sensor is fully immersed in water, the detection range of water depth is between 1 and 45m. The fishfinder has a lifespan of 10 hours and when in battery saving mode even longer. Features a 5-stage sensitivity setting that allows you to see fish in clear and murky water. Can be used in both fresh and salt water. With this Fishfinder, locating fish and finding a great spot becomes very easy!