Explanation :

SY121H is a unmanned airplane designed for use in agriculture and industry, as well as disaster prevention, measurement, fertilization, roadside control, photography and surveillance missions.
High total airplane output and 120 kg actual take-off weight
150 W air generator and stabilized power supply with rectifier, support aviation equipment and load requirements
The pilot can choose between three modes of flight: Smart mode, Manual plus mode, Manual mode. In Smart mode, fields can be easily planned without the need for cartographic knowledge or software.