The Alta OSD transmits through an installed FPV system on Alta giving the pilot critical flight information (battery voltage, heading, ground speed, etc) in addition to airframe video reference. 

This FPV system is available pre-installed when you purchase an Alta X (choose the option when you build your kit), but you can also buy it separately. 

• Not included: 5.8Ghz receiver/monitor

In the box:

• Qty 1 - RunCam Eagle 2 Pro (NTSC) 
• Qty 1 - Isolated FPV camera mount
• Qty 1 - TBS Unify Pro 5.8Ghz V3 Transmitter
• Qty 1 - Transmitter mount
• Qty 1 - Transmitter antenna