How to tell if device is connecting to 2.4 or 5 ghz band
I have a Time Capsule that has the dual (2.4 and 5.0 ghz) bands. I also have an Airport Express set up to extend the network. How can I tell which band a device is connecting to? I can see in Airport Utility which router (Time Capsule or Airport Express) a device is connected to because I can see them listed when I click on the individual routers. However, when I hover over each device, I don't see anything listed that will help me tell whether it's connected via the 2.4 or 5 ghz band.
MacBook Pro, OS X El Capitan (10.11.4), Processor 2.9 GHz Intel Core i7