The current list of devices that Barcode Solution 7.1 SP2 is designed to work with and certified for can be found in the current release notes. Note: Sub-models of the listed devices should also work successfully. For example, the Dolphin 7990 is a sub-model of the Dolphin 7900 and should therefore work just fine with Barcode.

Altiris Barcode Solution 7.1 SP2 from Symantec Release Notes
http://www.symantec.com/business/support/index?page=content&id=DOC4673

Also, as of this time, Barcode is not designed to work with iOS or Android devices. Information on this can be found here:

Does Altiris Barcode Solution support using iOS or Android-based devices?
http://www.symantec.com/business/support/index?page=content&id=HOWTO74646

Related Articles

Altiris Barcode Solution 7.1 SP2 from Symantec User Guide
http://www.symantec.com/business/support/index?page=content&id=DOC4672

What are the Supported Devices in Barcode 6.7 SP1 and Barcode 7.0?
http://www.symantec.com/business/support/index?page=content&id=HOWTO10416 

Error "Login failed" or "Could not establish connection to network" occur when trying to use Barcode on a handheld to authenticate or sync to the Symantec Management Platform server
http://www.symantec.com/business/support/index?page=content&id=TECH187775