QWinOut DIY FPV Drone: Tarot ZYX25 ZYX-M Flight Control System S-Bus DSM + ZYX-OSD On-Screen-Display Video Overlay System + Folding Antenna GPS Bracket Holder 1x ZYX-M Flight Control System 1x Tarot ZYX-OSD 1x GPS Folding Base Antenna ZYX-OSD has to work with ZYX-M fight control system ZYX-OSD has two way video input function, you can change the video input sources by the radio. The PAL and NTSC video format can be identified automatically.