diff --git a/GB_set_rendering_disabled.md b/GB_set_rendering_disabled.md
index db7d672..c4ad1e5 100644
--- a/GB_set_rendering_disabled.md
+++ b/GB_set_rendering_disabled.md
@@ -6,7 +6,7 @@ In `gb.h`
 
 ## Description
 
-TBD
+Call this function with `true` to disable video output in an emulator instance. This will make the [[run loop|GB_run]] of the emulator instance consume less CPU usage, and it's useful in scenarios where you don't need video output (e.g. sound-only applications or automations).
 
 ## Thread Safety