"Specification:
1) Depth readings from 2.0 to 240ft in 1/10th precision
2) Small round transducer with 7m cable,45-degree beam angle
3) 200KHz Sonar Frequency
4) Removable float
5) LED backlight with wide window display
6) 4xAAA batteries
7) Battery save mode
8) Battery strength indicator
9) Levels sensitivity setting
10) High/Low sensitivity setting
11) Clear fish icon
12) Fish alarm
13) User selectable meter or feet readings
14) Water Temperature Indicator
15) Water resistant design
16) Able to shoot through boat hull and clear ice
17) Can display different bottom (grass,sand,rock) in the sea
18) Can resist the interference from the grass when use in lake"