HI20S77 is a drone payload system which integrate the 20x optical zoom camera, 4K recording and 4K network RTSP video stream output, and 3-axis stabilized PTZ. The ground receiving end outputs standard RTSP, and the ground software supports PTZ control and zoom camera control. The PTZ adopts high-precision encoder FOC control scheme, which has the characteristics of high stability, small volume, light weight and low power consumption. The camera adopts CMOS SENSOR with 12 mega effective pixels; Support 4K local TF storage and RTSP code stream transmission. Network 2-ways control.