The RFX503 from RFaxis is a Front End Module with Frequency 5.15 to 5.9 GHz, Tx Power 22 dBm (802.11ac), 24 dBm (802.11a), 26 dBm (802.11a), Tx Gain 32 dB, Tx Current 400 mA, Voltage 4.5 to 5.5 V. Tags: Transmit Module. More details for RFX503 can be seen below.