diff --git a/README.md b/README.md
index c4d25d9..55e5850 100644
--- a/README.md
+++ b/README.md
@@ -22,10 +22,16 @@ Enable the following settings in Config.h:
 
     #define MMDVM_HS_HAT_REV12
     #define ENABLE_ADF7021
+    #define DUPLEX
     #define ADF7021_14_7456
     #define STM32_USART1_HOST
     #define ENABLE_SCAN_MODE
 
+Optionally:
+
+    #define SEND_RSSI_DATA
+    #define SERIAL_REPEATE
+
 Build the firmware:
 
     make