Features:Fish Finder: Designed for the liker in fishing. The unit can be used in the river, the lake, or the sea. It can help you to find out the fish and the depth of the water. Sonar Beams: Sonar technology is based on sound waves. The system uses sonar to locate and define structure, bottom contour and composition. All you need will clearly show on the display, you can quickly know the information. Comes with a neck strap, easy to hang on the neck, convenient for you to use. POWER, SETUP, ENTER and FT/M, 4 buttons on the fish finder, easy to use and choose mode.Specifications: Condition: 100% Material: ABS Weight: Approx. 567g / 20.0oz Fish Finder Size: Approx. 12 * 7.5 * 2.5cm / 4.7 * 3.0 * 1.0in Depth Range: Max: 100m / 3937.0in; Min: 0.7m / 27.6inMeasurement: Meters or FeetFish Detection: Fish Depth Scale, Fish Size Distinguish, Fish AlarmSensor Angle: 45 DegreesOperating Temperature: -20 to 70 Degree CelsiusPower Source: 4 * AAA Batteries (Not Included)Continuous Usage Time: Up to 24 HoursCable Length: Approx. 10m / 393.7in Display Size: 2inch TN/Anti-UV LCD DisplayBacklight: Green LED Sonar Frequency: 200KHz Package list: 1 * Fish Finder 1 * Manual 1 * Sonar Sensor 1 * Neck Strap 1 * Bolt1 * Wing Nut