# hardware > RouterOS directory reference for /system/resource/hardware. ----------- ## system/resource/hardware **Conditions:** !powerpc, !smips **Type:** Directory Detected hardware devices connected over PCI, USB or SCSI buses. Empty on boards with no such bus (for example the hAP ax²). inactive: the device is present but not active Name of the device as reported by its firmware (name column refinement) Device location in the system topology Parent bus or controller Bus type of the device: `usb`, `pci`, `scsi` or `serial` Device vendor name Device name or model Device category Device serial number Vendor identifier (VID) Device identifier (PID / Device ID) Negotiated device speed Number of ports provided by the device Supported USB version Maximum power draw reported by the device (for example a USB modem) Assigned interrupt number Memory window assigned to the device I/O window assigned to the device Subsystem or driver owning the device Device path from root bus to endpoint