diff --git a/todo.md b/todo.md
index b3d9ba6..288fb56 100644
--- a/todo.md
+++ b/todo.md
@@ -3,7 +3,10 @@
 - add unit toggle/binding; `Ghz` can be fairly vague - users may prefer `Mhz`/`Hz`
     - tldr: may be wanted for precision
     - driver provides *hertz*, with modern cards is fairly excessive
-    - conversion is done using `format_frequency`; a wrapper of `format_size` from `humanfriendly`
+    - conversion is done using `format_frequency`
+        - a wrapper of `format_size` from `humanfriendly`
+        - _(currently)_ defaults to highest sensible unit, changing on scale. 
+        - often flipping between `500Mhz` / `2.6Ghz` where consistency may be preferred
 
 - restore `argparse`
     - primarily: `--card` / `-c`, to skip `amdgpu` device detection