Tarot ZYX-OSD TL300C is a video overlay system with two-way video input for multicopter. With ZYX-OSD TL300C,some basic fight information can be superposed on the receiver, such as altitude, speed, attitude angle, battery voltage, the distance between aircraft and return point, control mode, return to home status and etc. You can obtain actual fight status in real time to ensure a safe and delightful journey.ZYX-OSD has two-way video input, you can change the video input sources by the radio. The PAL and NTSC video format can be identified automatically.ZYX-OSD also has data record function. The flight data could be stored in the MINI-SD card, with this you can do the data analysis, likes the black box function.When you use it for the first time, format the MINI-SD card to FAT32 format.