Abstract: Some demonstrative embodiments include apparatuses, devices and/or methods. For example, an apparatus may include a memory, and processing circuitry coupled to the memory. The processing circuitry is configured to execute logic stored in the memory to cause a power-constrained Neighbor Awareness Networking (NAN) Device (PD NAN Device) within a NAN Cluster to transition to a non-synchronization-frame (non-Sync-frame) mode based on a triggering event including at least one of: reception, by a NAN layer of the PD NAN Device, of transition instructions from a Service/Application layer of the PD NAN Device; or reception by the PD NAN Device of a management frame from a non-power-constrained NAN Device (non-PD NAN Device), the management frame including information on the PD NAN Device transitioning to a non-Sync-frame transmitter mode.