diff --git a/Include/config.h b/Include/config.h
--- a/Include/config.h
+++ b/Include/config.h
@@ -10,6 +10,8 @@
 // Transmitter config (si446x.c)
 // --------------------------------------------------------------------------
 
+// Transmit power (0-0x7F, 0mW - 40mw?)
+#define SI446x_POWER 0x02
 
 #define TUNE_FREQUENCY 433000000UL
 
diff --git a/Libraries/Si446x/si446x.c b/Libraries/Si446x/si446x.c
--- a/Libraries/Si446x/si446x.c
+++ b/Libraries/Si446x/si446x.c
@@ -133,7 +133,7 @@ void si446x_init(void)
     HAL_Delay(10);
 
 	// Set Si446x initial output power, input to power amp (0-0x7F, 0mW - 40mw?)
-	uint8_t basepower = 0x02;
+	uint8_t basepower = SI446x_POWER;
 	// FIXME: basepower should be 0x10 for underperforming units and 0x04 for normal units
     uint8_t set_power_level_command[] = {SI446x_CMD_SET_PROPERTY, 0x22, 0x01, 0x01, basepower};
 	si446x_sendcmd(5, set_power_level_command, SI446x_CHECK_ACK);