APM has an companion OSD board called MinimOSD. It reads all the MAVLink  data in the APM telemetry stream and overlays it on the video stream if  you're using an on-board camera and wireless video transmitter. This is  useful if you're flying in First Person View (FPV) mode or don't want to use a laptop at the field to see your telemetry data in the Mission Planner. 

Important - You cannot connect use the OSD when your APM 2. is also connected via USB (they share the same port). Make  sure you disconnect your USB cable from the APM 2 board before  attempting to use the OSD.

Package Contents:

• 1x MiniMOSD
• 1x Cable Harness Set
• 1x Plastic Case