The present invention relates to a multi-jeonjajji, and the coupling member is coupled to the top, the body portion is formed in both side wings being configured; The antenna is configured on the upper top cap mounted to the upper body; The lower cap is provided on the body bottom portion; Separate multiple circular magnetic body is installed the floats will be installed inside the movable body; To determine the position of the float body with an interval nibble confirmation sensor is installed in the body; And the control unit receives a signal of the sensor so that the user can check bite is a signal corresponding to the radio receiver nibble with, PCB substrate made of a radio transmitter is mounted to the body space; And nibbling characterized in that the confirmation sensor and the auxiliary substrate is inside the power supply circuit and the battery to the upper cap installed on top of the body to be capable of supplying the necessary power is installed in the PCB configuration, the ultrasonic installed in the lower cap inner coupled to jeonjajji body bottom detection fish by the sensor and the depth of water, and let you know the temperature to be capable of performing the leisure sports fun forgetting fishing boredom of waiting aimlessly, to understand the water situation through the lower cap cameras, so identifying species using IT, science it is effective to enjoy the culture, leisure fishing methods. ; Jeonjajji, removable circular magnetic, nibbling check sensors, ultrasonic sensors, measuring water depth, temperature measurement, camera, Fish detection,
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