diff --git a/Variant-USART.md b/Variant-USART.md
index f9d72cf..1995f1a 100644
--- a/Variant-USART.md
+++ b/Variant-USART.md
@@ -30,8 +30,8 @@ Following feedback is sent:
 - Start frame(unsigned int16) : 0xABCD
 - Cmd1(signed int16) : Steer or Brake(hovercar) after normalizing and mixing
 - Cmd2(signed int16): Speed or Throttle(hovercar) after normalizing and mixing
-- SpeedR(signed int16) : Measured right wheel speed
-- SpeedL(signed int16) : Measured left wheel speed
+- SpeedR(signed int16) : Measured right wheel speed in RPM
+- SpeedL(signed int16) : Measured left wheel SPEED in RPM
 - Battery Voltage(signed int16) : Calibrated Battery Voltage *100
 - Temperature(signed int16) : Temperature in °C *10
 - Led(unsigned int16) : Used to control the leds on the sideboard