Portable wire DOT martix sonar fish finder tl58

Feature:
1)switchable fish identification mode;
2)sensitivity: Five levels;
3)chart speed: Five levels;
4)multi level depth range;
5)big/small fish identification;
6)fresh/salt water environment;
7)ture changing water bottom graph.

Specifications:
1)display
A. Display size: 41mm(w)x48mm (h), fstn LCD b. Display resolution: 128x64 (hxw) pixels c. Backlight: On/auto d. Visible under strong sunlight

2) sonar
A. Depth capability: 1-240ft/0.6-73.2m b. Sonar frequency: 125KHz c. Sonar beam angle: 45degree d. Sonar alarms: Fish /shallow

3)technical data
Built-in memory stores sonar settings when the unit is turned off
Temperature: Water temperature sensor included in main unit
Operational temperature: -4f to 158f(-20c-70c)
Sensor could shut down when the sonar sensor is out of water
Units: Meter or feet
Unit dimensions: 130mm x 70mm x 25mm

4)power
Power supply: 4xaaa alkaline batteries
Handheld battery life: 45hours continuous use
Handheld power off automatically in 10 minutes without any using.