From the manufacturer:
300 Series Gigabit Unmanaged Essentials PoE SwitchesExpanding Wired Connectivity for Small Business Networks needing PoE
NETGEAR Gigabit Unmanaged Essentials Switches with PoE provide easy, reliable, and affordable network connectivity for home and small offices. With these unmanaged plug-and-play switches, you can expand your network connections to multiple devices instantly.
The unmanaged switches provide power and data from a single Ethernet (CAT-5e) cable to devices such as IP cameras, VoIP/ Internet-based phones, wireless access points, etc. NETGEAR’s unique PoE technology automatically balances the PoE power based on the device needs independent of PoE class detected. These switches deliver the power the device needs, at the most granular level.

• 8 Gigabit Ethernet ports
• 4 PoE ports with 53W total power budget
• Simple plug-and-play setup with no software to install or configuration needed
• Supports desktop or wall mount placement
• Energy efficient design compliant with IEEE802.3az
• Silent operation ideal for noise sensitive environment