Here we have an Omnipower 450 LAN line voltage and battery backup. It is being listed as for parts or not working because I do not know enough about this to test it. The internals look great with no broken or frayed wires, original battery appears in good shape. As far as I can tell, nothing looks wrong with it or is missing aside from 2 screws that hold the top cover. Master switch works as expected and alarm reset button.  comes with power cord and some sort of auxiliary cord. Being sold as-is. Thanks for looking