diff --git a/Protocols_Details.md b/Protocols_Details.md
index c410690..79abf4b 100644
--- a/Protocols_Details.md
+++ b/Protocols_Details.md
@@ -75,7 +75,7 @@ Telemetry enabled for battery voltage and RX&TX RSSI using FrSky Hub protocol
 
 Option is used to change the servo refresh rate. A value of 0 gives 50Hz (min), 70 gives 400Hz (max). Specific refresh rate value can be calculated like this option=(refresh_rate-50)/5.
 
-RX_Num is used to give a number a given RX. You must use a different RX_Num per RX. A maximum of 16 AFHDS2A RXs are supported.
+**RX_Num is used to give a number a given RX. You must use a different RX_Num per RX. A maximum of 16 AFHDS2A RXs are supported.**
 
 CH1|CH2|CH3|CH4|CH5|CH6|CH7|CH8|CH9|CH10|CH11|CH12|CH13|CH14
 ---|---|---|---|---|---|---|---|---|---|---|---|---|---