diff --git a/HamShield-Library-Reference.md b/HamShield-Library-Reference.md
index f61b6dc..bc163b8 100644
--- a/HamShield-Library-Reference.md
+++ b/HamShield-Library-Reference.md
@@ -49,6 +49,21 @@ radio.setChanMode(12.5KHZ);
 
 Returns the current channel mode as a uint16_t.
 
+#### radio.setRfPower(0-8);
+Sets the output power for TX. A setting of 0 is lowest, a setting of 8 will give highest power output.
+-RF Power	mW RF
+_____________________
+-0	        50
+-1	        55
+-2	        60
+-3	        65
+-4	        75
+-5	        95
+-6	       100
+-7	       105
+-8	       630 (This is approximate RF power for 440. 2m output is closer to 500, and 220 mhz is in between)
+
+
 #### radio.setModeTransmit();
 
 Turns on the transmitter, as long as it is within a United States ham radio band. See .dangerousMode() to override.