Exit Sign

Anybody know what brand/model Exit Sign this is? It is in sheetrock and no way to get above. Need to replace batteries as it failed 90 min. test.
Thanks

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Not certain on the model, but if you can figure out how to take it apart you may be able to find the batteries you need. Usually it’s as simple as needing only to push a button and pull or insert a screw driver to push down a tab of some kind. Any buttons or anything on the base to loosen and allow the fixture to come down? Recessed signs can be a pain.