RB912 Tx Power

What is the real tx power of the RB912?
RB912-Tx-Power-v6.jpg
RB912-Tx-Power-v5.jpg

maybe if you enable second chain you will see the diference

Thanks, I had forgotten about it.
But, RoutersOs uses a strange way to show the tx power when using the two chains.
RB912-tx-power.jpg

Yes, it is correct. Using two chains adds 3dbm. Or more correctly - disabling one of the chains reduces total power by 3dbm