Free cast with fishing rod or tied with RC boat.
1. Brief Specifications:
1) Unit Dimensions: 120mm X 55mm X 23mm. Sealed and Waterproof.
2) Display: Big Adjustable High-contrast Dot Matrix LCD
3) Resolution: 130 pixels (vert. ) X 64 pixels (horiz. ); 8, 320 total pixels.
4) Main Unit Power Requirement: 4 X AAA Alkaline Batteries
5) Battery Life: Main unit 80 Hours Continuous Use
6) Depth Capability: 1~100 ft
7) Operational Temperature: From -10C to 50C (14 Fto122 F)
8) Sonar Coverage: 80deg @-10db (115kHz)
9) Temperature: Air temperature sensor inlucuded in main unit
10) Wireless Operating Range: 130 ft
11) Water Switch technology applyed. Sensor could shut down when the Sonar Sensor is out of water.
12) FREECAST sensor battery life: Typically lasts for 550 hours of in-the-water usage.

2. Features
1) Switchable Fish Identification mode
2) Fish/Shallow Alarms.
3) High/Low Sensitivity setting: .
4) Off/Auto Back Light
5) Adjustable Display Contrast
6) Power Save: On/Off.
7) Depth Units: Meters/Feet.
8) Celsius/Fahrenheit Temperature Units
9) Fresh/Salt Water Environment
10) True Changing Water Bottom Graph.
11) Preservable program setting
12) Storage bag and neck strip
13) Big/small fish identification
14) Water resistant
15) Choose detecting range automatically
16) Back-up memory: Built-in memory stores sonar settings when the unit is turned off.

Package:
49x40x15cm (12pcs/Ctn)
G.W./N.W.: 5kgs/4.5kgs (12pcs)