diff --git a/GB_is_cgb_in_cgb_mode.md b/GB_is_cgb_in_cgb_mode.md
index 3d0cb06..74805e6 100644
--- a/GB_is_cgb_in_cgb_mode.md
+++ b/GB_is_cgb_in_cgb_mode.md
@@ -6,8 +6,12 @@ In `gb.h`
 
 ## Description
 
-TBD
+Returns `true` if the emulator instance currently emulates a Game Boy Color or a newer model, and it is not currently in DMG compatibility mode.
 
 ## Thread Safety
 
 `GB_is_cgb_in_cgb_mode` is thread-safe and can be called from any thread and context.
+
+## See Also 
+
+* [[GB_is_cgb]]
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