What's the difference between AIR-CAP2602I-A-K9 with AIR-CAP2602I-E-K9?

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1

Does who know the difference between Cisco AIR-CAP2602I-A-K9 Access Points with AIR-CAP2602I-E-K9 ? If have no idea, follow the guide below:

AIR-CAP2602I-A-K9 overview:
Cisco 2600 AP AIR-CAP2602I-A-K9 802.11n CAP w/CleanAir; 3x4:3SS; Mod; Int Ant; A Reg Domain

AIR-CAP2602I-E-K9 overview:
Cisco 2600 AP AIR-CAP2602I-E-K9 802.11n CAP w/CleanAir; 3x4:3SS; Mod; Int Ant; E Reg Domain

2

The ‘x’ in the model numbers represents the regulatory domain. Refer to “Regulatory
Domains” section on page 6 for a list of supported regulatory domains.

Found in http://www.cisco.com/c/en/us/td/docs/wireless/access_point/2600/quick/guide/ap2600getstart.pdf