diff --git a/Variant-IBUS.md b/Variant-IBUS.md
index bfdc696..f775b85 100644
--- a/Variant-IBUS.md
+++ b/Variant-IBUS.md
@@ -4,6 +4,7 @@ It will send all channels on a single wire like PPM, but is more reliable as it
⚠ Ibus telemetry is not handled by the firmware
## :gear: Configuration/Parameters
+Voltage [Control Mode](https://github.com/EFeru/hoverboard-firmware-hack-FOC#foc-firmware) is used by default.
Ibus control is reusing some of the USART control parameters.
Use CONTROL_SERIAL_USART3 and FEEDBACK_SERIAL_USART3 for the right sensor cable(default), or CONTROL_SERIAL_USART2 and FEEDBACK_SERIAL_USART2 for left sensor cable.
IBUS_NUM_CHANNELS is the number of channels for IBUS and is 14 by default. As an example Flysky fs-i6ab or RX2A receivers are sending 14 channels even when used with a 6 channel transmitter