diff --git a/variants/xiao_ble/variant.h b/variants/xiao_ble/variant.h
index 1869e4eee..4ca38f928 100644
--- a/variants/xiao_ble/variant.h
+++ b/variants/xiao_ble/variant.h
@@ -147,6 +147,11 @@ static const uint8_t SCK = PIN_SPI_SCK;
 #define REGULATORY_GAIN 10
 #define SX126X_MAX_POWER 20
 #endif
+#ifdef EBYTE_E22_900M33S
+// 25dB PA gain and 33dB rated output; based on TX Power Curve from E22-900M33S_UserManual_EN_v1.0.pdf
+#define REGULATORY_GAIN 25
+#define SX126X_MAX_POWER 8
+#endif
 #endif
 
 /*