The DGS-1100-05PD is a unique 5-port Switch powered through the network cable by an upstream PoE power source (PoE switch or injector).
Specifications

Brand: D-Link

Warranty: Limited Lifetime

Ethernet Speed: Gigabit Ethernet

Lan Ports: 5

Switching Capacity: 10 Gbps

SKU: DGS-1100-05PD