Device Power State is the current power state of the network interface card. Power state 0 is the active operating state, ...

Device Power State is the current power state of the network interface card.  Power state 0 is the active operating state, while power state 3 is the device's lowest power state.  Intermediate states 1 and 2 are device-specific sleep states.  For example, a USB NIC uses power state 2 to allow remote-wakeup.