Sunsbell&reg;Portable Wireless Fish Finder Sonar echo Sounder 70m 230Ft Dot Matrix Fishing Finder 100% brand new and high quality. 2 years warranty. Battery life of Wireless Sensor: up to 550 hours in water usage Wireless sensor and can be mounted on fishing rod.Dot Matrix LCD display with white LED backlight. Wide Wireless Operation Range: 70 Meters (230 Feet), waterproof IP6. Determines the location and depth of fish, can be used in both fresh and salt water.