Buying used Time Capsule - Dual band or not?

[CrEsTo]

Hi guys,

I'm looking to buy a 2nd hand time capsule and replace the original 500gb HD for a 2TB one.

How do I know it's the version with dual band? Seller claims that it was purchased 18-24 months ago.

Serial number is 6F81804MYZY

Thanks

 

[slapguts]

http://appleserialnumberinfo.com

According to the model number they list, it's a single band version.

 

[CrEsTo]

I didn't know about that site.

Thanks a lot!