Features:
OOTDTY  
This wireless fish Finders comes with clear LED displa. It's easy to read the screen in sunlight or night.
Water bottom and structure is showed in middle as well as water depth, fish size, and location.
Can set fish alarm, depth alarm, contrast, chart speed(10 grades), fish display, unit(depth: meter/feet; temperature.
You can mount the Sensors on boats or fishing rod with string or float it to accessible area.
This is a great partner to go Ice Fishing, Lake Kayaks Boats Fishing.

Specifications:
Materials: ABS and aluminum alloys
Color: Black Redness/Green/All Black
Size: about 12.5x6.3x2cm/4.92x2.48x0.79inch
Battery: 3.7V 1000mAh
Screen: 2.4inch
Use time: 5 hours
Depth detection: 0.6-40m/1.97-131.23ft
Sonar frequency: 125KHz
Detection distance: 100m/328ft
Working temperature: -10-70°
Radiation angles: 45°

Package Includes:
1pc Portable Wireless Fish Finders

Note:
Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.