From the rear view of WDAP-2000PE, the left SMA connector outputs 5GHz radio only, and the right SMA connector outputs both 2.4GHz and 5GHz radios. The two dipole antennas bundled in WDAP-2000 standard package are dual-band compatible. They are capable to deal with both 5GHz and 2.4GHz radios. However, if you need to replace the original antennas, please make sure you are using the suitable one for each connector.