This fish finder is designed for the liker in fishing. It can detect both fish location and fish size in both fresh and salt water, and can be used as a depth sounder.

Specification:
Brand: Lucky
Model: FF918-100W
Material: ABS 

-Fish Finder
Display: High-contrast FSTN LCD, 4-level grayscale, 160V×132H
Backlight: 8 white LED
Language Options: English 
Wireless Frequency: 433.92MHz
Transducer Cable Length: 8m / 24ft
Operational Temperature: -14-122°F (-10-50°C)
Power Input: 11-13V DC or 8 * AA Alkaline battery (not included)
Power Output (RMS): 100W
Power Output (Peak-to-Peak): 800W
Dimension: 14 * 14cm / 5.5 * 5.5in
LCD Size: 8.3 * 7cm / 3.3 * 2.8in

-Sensor
Beam Angle: 45° in 200 KHz (cable transducer) / 90° in 125 KHz (wireless)
Depth Range: 100m / 300ft (cable transducer); 45m / 135ft (wireless)
Power Requirement: 1 * CR2032 (Included)
Dimension: 7.9 * 5.4 / 3.1 * 2.1in

Package Size: 16 * 15 * 15cm / 6.3 * 5.9 * 5.9in
Package Weight: 1064g / 2.3lb

Package List:
1 * Fish Finder (Wireless Mode & Transducer) 
1 * Transducer Sonar Sensor 
1 * 8M Antenna for Wireless Mode 
1 * Wireless Sonar Sensor 
1 * 3V CR2032 Button Cell Battery for Sensor 
1 * Instruction Manual for Transducer Mode 
1 * English Instruction Manual for Wireless Mode 
1 * Transom Mount w/ Crater Suction Cup System 
1 * Power Connector between Fish finder and Boat 

Product Features

• WIRED TRANSDUCER: Depth Capability/Range 100m (328ft); Operating Frequency 200 KHz; Coverage 45 degrees beam angle; Built-in temperature sensor; Transducer cable length 8m (26ft).
• WIRELESS SONAR SENSOR: Depth capability/range 0.6 ~ 40m (2 ~ 131ft); operating frequency 125KHz; Coverage 90 degrees beam angle; Built-in temperature sensor operation range 70m (210ft); Power supply 1 x 3v cr2032 button cell battery (included).
• 2-IN-1 WIRED TRANSDUCER: W/ 45° beam angle & wireless sensor w/ 90° beam angle; Can be used as a fish finder and a depth sounder; Built-in water temperature sensor for both transducer sonar & wireless sensor; Fully waterproof design (wireless sensor).
• SENSORS: Wireless sensor signal strength indicator w/ alarm when signal has been cut off; Sensitivity indicator for wired transducer; Wireless sensor automatically shutdown when out wet area or out of water; Battery strength indicator and Power save mode.
• FISH ICON DISPLAY: Large, medium and small fish symbols (3 fish size display) / Option to view raw sonar returns (arch) or clear fish icons with fish depth location; Adjustable Sonar Sensitivity setting, Contrast setting, Depth Range Setting.