Best for both amateurs & professionals! No wires, means you will not need to get in a tangle with your lines.Use in ocean, rivers, lakes, ponds, reservoirs or calms ea conditions. Fantastic for detecting schools of fish in any particular area. Scan a large area in just a few minutes and not just the water directly beneath the unit. Gain true depth readings in graphical format in units of depth. 

Features
Detects both fish location/depth in fresh and salt water
Display Fish Icon and Live-Update Water Bottom Contour (grass, sand, rock)
Detects and displays big/small fish or groups of big and small fish
Resist interference from grass when used in lake
Adjustable chart speed, sensitivity level, depth range, Sonar sensitivity setting
Audible fish & depth alarm
Zoom at specified depth
Indicator for battery & Signal for Wireless Sensor
Simulation mode
Built-in memory stores sonar setting
Sensor auto switch off when not in water
CE & RoHS approved

Specifications
Display: Adjustable High-contrast Dot matrix FSTN LCD 128(V) x 64(H) Size: 41 x 48mm
Backlight: White LED (on/off)
Frequency: 433 MHz wireless, 125 kHz sonar
Wireless Sensor Coverage: 90° beam angle
Depth Range: 45m
Wireless operational range: 120 meters
Water Temperature: °C/°F
Units: meter or feet
Built-in memory stores sonar setting when the unit is turned off
Operating Temp.: 14~122°F (-10~50°C)
Storage Temp.: -4~158°F (-20~70°C)
Language: Englsih (default), Russian and Deutsch
Battery life of Wireless Sensor: up to 550 hours in water usage
IPX4 Water Resistant Design / Level-4 (spray-water-proof)

Set Includes
1 x Professional Wireless Fish Finder (Black Color)
1 x Wireless Sensor
1 x External Antenna
1 x Neck Strap
1 x 3V CR2032 Button Battery
1x Water Proof Bag (Free)
1 x User Manual