This amazing fish finder is specially designed for amateur and professional fishermen to find fish location, depth and bottom contour of water, perfect to be used in the sea, river, lake and fantastic for detecting schools of fish in any particular area. Features: 2.4-inch TN/anti-UV LCD display with backlight. Depth reading from 2.0ft to 240ft; 200KHz sonar frequency. 5-level user selectable sensitivity. Bottom contour, weed, rock, water temperature indicator. Display small/big fish and send alarm when any fish is detected. Water depth shows by M/FT; water temperature shows by ℃/℉. Powered by 4 AAA batteries (not included); battery life indicator. Compact, lightweight and portable, convenient for fishing. Can be used for fishing off the dock, on a boat, and ice fishing. Specifications: Display Type: 2.4" TN/anti-UV LCD Backlight: White LED Depth Range: Max. 240ft Sonar Frequency: 200KHz Battery: 4 AAA batteries (not included) Audible Alarm: Fish/low battery Operation Temperature: -20~70℃ Dimension: 12 * 7.5 * 3.2cm / 4.7 * 3.0 * 1.2in Weight: 150g / 5.3oz Package Size: 17 * 11.7 * 11.7cm / 6.7 * 4.6 * 4.6in Package Weight: 640g / 1.4lb Package List: 1 * Fish Finder 1 * Transducer with Cable and Float 1 * Neck Strap 1 * User Manual