This is the Guardian Stabilization Expander from Eagle Tree Systems.
For use with the Eagle Tree Systems OSD Pro Expander
Sensor based expander provides high degree of stabilization to fixed
wing or elevon model airplanes
Also provides an Artificial Horizon Indicator (AHI) on the OSD Pro
Stabilization gain can be controlled by an extra knob on transmitter
via the OSD Pro's Aux2 port allowing stabilization to be tuned or
turned off during flights
Guardian Stabilization Expander with Wire Lead
– If you need more information, use these Eagle Tree Systems resources –
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