diff --git a/Variant-SKATEBOARD.md b/Variant-SKATEBOARD.md
index e1e4ec5..9de874b 100644
--- a/Variant-SKATEBOARD.md
+++ b/Variant-SKATEBOARD.md
@@ -9,7 +9,8 @@ When the remote is at middle/resting position, the motors are freewheeling (Torq
 Use 3.3v from programming port, 5v from hall sensor cable, or a voltage regulator.
 
 ## Calibration:
-Proceed with [calibration](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Calibration) for better control. 
+Proceed with [calibration](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Calibration) for better control.<br>
+This variant is expecting only one mid-resting input, calibration will be rejected otherwise.
 
 ## Troubleshooting:
 If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics)