1. Detect the water depth and bottom layer to quickly find the bottom and understand the bottom structure; 2. To detect the depth and size of fish, it is better to use it as fishing gear; 3. Measure the water temperature and increase the of fishing by understanding the fishing waters. Power supply mode: DC 10V-18V Depth range: 0.6m-73m Frequency: 125KHz Material: ABS colour: As shown Package Contents: 1 x 1 x charging cable 1 x canvas bag 1 x bundle pocket 1 x Chinese and English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.