diff --git a/Commands.md b/Commands.md
index efe5bb3..dc1e723 100644
--- a/Commands.md
+++ b/Commands.md
@@ -7,7 +7,7 @@ Given we use I2C for comms using hex as the commands are reasonable.
 ### Configuration
 | hex | config option | description | accepted values |
 | :- | :- | :- | :- |
-| TBD | TBD | TBD | TBD |
+| 0x01 | Fan Speed Sample Rate | The amount of time between each fanspeed sample in ms | uint16_t |
 
 ### Voltage source
 | hex | source |