Solution:

ADAM-4550 ( ADAM-4550-B ) has been compliant with both FCC Part A rules and the CE/ ETS( European telecommunication standard) 300.328/300.683 unlicensed spread spectrum radio regulation. Note: ETS 300.283 rule for radio equipment operating in the 2.4 GHz ISM band ETS 300.683 rule for CE issue Because the ADAM-4550 changes from version A to B, it not only the upgrades its functions, but the antenna connector on the ADAM-4550 is modified from SMA male to SMA female. Please mention your customers, if possible: "If they purchase the adapter cable for ADAM-4550, the ANT-6011 is the right choice for them, except they wanna get the ANT-6010 for their old ADAM-4550-A.." Note: ANT-6010 2ft RF cable SMA standard to N male ( for ADAM-4550-A ) ANT-6011 2ft RF cable SMA reverse to N male ( for ADAM-4550-B) Well, how to correctly apply the antennas and their external accessories? please refer to ADAM-4550 user's manual page 32, the delivery time for these stuffs is 3 weeks.