What is the attribute name when inputting system ID's to get all Details

I am trying to get All details for all Systems DeviceID's in the WMS.  The systems Api only gives me some Attributes details for all system devices. I would like to get all Attribute details for all system deviceID's.  I have tried appending to the uri with an array of IDs such as this

"?@odata.id=$IDs" but it doesn't seem to work. I suspect I am using the wrong attribute Name.  I'm attempting to get a full device collection of all attributes.