Manually set fluctuation of the measuring range at will. High sensitivity gain & shallow gain, clear sonar return detection. Automatic recognition of automatic range & underwater without manual operation. Composed of multi-color, make multi-level waveform more delicate. The screen split display ratio is adjustable. Pause screen charting, move the cursor to measure any target location. Any depth alarm setting to meet users’ needs. Various protection features: over-voltage, over-current, no polarity input. The easy-to- use silicone rubber key is flexible and realizable. Modular design and performs with high stability. The default setting will not lose. Record file / picture according to the user's needs. Multiple alarm modes: depth, voltage, fish & temperature. Various display modes to show sonar return and the zoom view of bottom. Real Time Sonar RTS Window.