Note that any power levels above +3 dBm are considered "boost mode" for the transmitter and will consume significantly more current than other power levels. Please consult the data sheet or reference manual for your EM3xx IC for electrical specifications. Also note that any power level chosen in software that is within the -43 to +8 range but doesn't correspond to an integer in this set will result in the next-lowest setting from the list. For example, selecting TX power of -10 in software causes the PHY to choose the -11 dBm setting.