Wireless DOT Martix Sonar Fish Finder (TL66)   Feature:
1)switchable fish identification mode;
2)sensitivity: 0-100% adjustable range;
3)chart speed: 0-100% adjustable;
4) multi level depth range;
5)"freeze" screen at any time;
6)big/small fish identification;
7)fresh/salt water environment;
8) ture changing water bottom graph;

Specifications:
1)display
A. Display size: 3.0 in/ 76mm, fstn LCD b. Display resolution: 128x64 (hxw) pixels c. Display contrast: 0-100% range adjustable d. Backlight: On/auto
E. Visible under strong sunlight

2) sonar & radio
A. Depth capability: 1-130ft/0.3-40m b. Wireless operating range: 168ft/50m
C. Sonar frequency: 115KHz d. Sonar beam angle: 80deg @ -10dB e. Radio frequency: 433.9 MHz f. Sonar alarms: Fish /shallow

3)technical and casing
Built-in memory stores sonar settings when the unit is turned off
Temperature: Air temperature sensor included in main unit
Operational temperature: From -10c to 50c (14f to 122f )
Sensor could shut down when the sonar sensor is out of water
Units: F/ft f/m c/ft c/m
Unit dimensions: 138mm x 69mm x 32mm

4)power
Power supply: 4xaaa alkaline batteries
Sensor battery life: 550 hours of in-the-water usage, sensor battery can be replaced.
Handheld battery life: 45hours continuous use
Handheld power off automatically in 10 minutes without any using.