According to the BACnet protocol documentation:

Defines a standardized object whose properties represent the externally visible characteristics of a BACnet device. There shall be exactly one Device object in each BACnet device. A Device object is referenced by its Object_Identifier property, which is not only unique to the BACnet device that maintains this object but is also unique throughout the BACnet internetwork.

Objects of type device have the following properties:

•ackedTransitions

•activeCovMultipleSubscriptions

•activeCovSubscriptions

•activeVtSessions

•alignIntervals

•apduSegmentTimeout

•apduTimeout

•applicationSoftwareVersion

•backupAndRestoreState

•backupFailureTimeout

•backupPreparationTime

•configurationFiles

•databaseRevision

•daylightSavingsStatus

•deployedProfileLocation

•description

•deviceAddressBinding

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•firmwareRevision

•intervalOffset

•lastRestartReason

•lastRestoreTime

•localDate

•localTime

•location

•maxApduLengthAccepted

•maxInfoFrames

•maxMaster

•maxSegmentsAccepted

•modelName

•notificationClass

•notifyType

•numberOfApduRetries

•objectIdentifier

•objectList

•objectName

•objectType

•profileLocation

•profileName

•propertyList

•protocolObjectTypesSupported

•protocolRevision

•protocolServicesSupported

•protocolVersion

•reliability

•reliabilityEvaluationInhibit

•restartNotificationRecipients

•restoreCompletionTime

•restorePreparationTime

•segmentationSupported

•serialNumber

•statusFlags

•structuredObjectList

•systemStatus

•tags

•timeOfDeviceRestart

•timeSynchronizationInterval

•timeSynchronizationRecipients

•utcOffset

•utcTimeSynchronizationRecipients

•vendorIdentifier

•vendorName

•vtClassesSupported