Get-ActiveSyncDeviceStatistics

I have the below to generate details about a users active synced devices, but i also need it to return the ExtensionAttribute5 from AD, How can I do this?

Get-ActiveSyncDeviceStatistics -Mailbox "fbloogs" | Select-Object DeviceType,DeviceOS,DevicePhoneNumber,FirstSyncTime,LastSyncAttemptTime,LastSuccessSync,LastPolicyUpdateTime

Thanks