what model is this MacBook Air?

..gene4321:

Perhaps better suited without question, information from this resource

may be used to define your 'build model year' of manufacture, MB/Air?

• Identify your MacBook Air model - Apple Support

https://support.apple.com/en-us/HT201862

Each model year presented from recent, back to about 2009 covers

'Tech Specs' -and/or- has 'User Guide' links to Support's database.

Introduction section tells 'how to identify' MacBook Air by common

reference information. And numbers; either on, or inside the Mac..

And MacTracker.ca offers free downloadable database application

which sees occasional updates; w/specs, model, EMC, etc. numbers.

Also, EveryMac site has near every one Apple has ever made, w/ specs.

• Apple MacBook Air Specs (All MacBook Air - Tech Specs) | EveryMac.com

https://everymac.com/systems/apple/macbook-air/index-macbook-air.html

Covers: 2008 to 2020+ M1 MacBook Air 13-inch; w/exception: custom builds.

What did you need to know about your MacBook Air; either 11-inch/13-inch?