diff --git a/components/esp_wifi/include/esp_now.h b/components/esp_wifi/include/esp_now.h
index 757bed08ea..60b5cd9ee4 100644
--- a/components/esp_wifi/include/esp_now.h
+++ b/components/esp_wifi/include/esp_now.h
@@ -97,9 +97,10 @@ typedef struct esp_now_recv_info {
  */
 typedef struct esp_now_rate_config {
     wifi_phy_mode_t phymode;                 /**< ESPNOW phymode of specified interface */
-    wifi_phy_rate_t rate;                    /**< ESPNOW rate of specified interface*/
-    bool ersu;                               /**< ESPNOW using ersu send frame*/
-    bool dcm;                                /**< ESPNOW using dcm rate to send frame*/
+    wifi_phy_rate_t rate;                    /**< ESPNOW rate of specified interface */
+    bool ersu;                               /**< ESPNOW using ERSU to send frame, ERSU is a transmission mode related to 802.11 ax.
+                                                  ERSU is always used in long distance transmission, and its frame has lower rate compared with SU mode */
+    bool dcm;                                /**< ESPNOW using dcm rate to send frame */
 } esp_now_rate_config_t;
 
 /**
diff --git a/components/esp_wifi/include/esp_wifi_types_generic.h b/components/esp_wifi/include/esp_wifi_types_generic.h
index beb2e06212..c0a7933a04 100644
--- a/components/esp_wifi/include/esp_wifi_types_generic.h
+++ b/components/esp_wifi/include/esp_wifi_types_generic.h
@@ -768,8 +768,8 @@ typedef enum {
     WIFI_PHY_RATE_MCS8_SGI,         /**< MCS8 with short GI */
     WIFI_PHY_RATE_MCS9_SGI,         /**< MCS9 with short GI */
 #endif
-    WIFI_PHY_RATE_LORA_250K = 0x29, /**< 250 Kbps */
-    WIFI_PHY_RATE_LORA_500K = 0x2A, /**< 500 Kbps */
+    WIFI_PHY_RATE_LORA_250K = 0x29, /**< Espressif-specific Long Range mode rate, 250 Kbps */
+    WIFI_PHY_RATE_LORA_500K = 0x2A, /**< Espressif-specific Long Range mode rate, 500 Kbps */
     WIFI_PHY_RATE_MAX,
 } wifi_phy_rate_t;