Bosch Security Systems 4-port Midspan PoE Injector (NPD-5004-POE)
Amazon.com: TRENDnet 65W 4-Port Gigabit PoE+ Injector, TPE-147GI, 4 x Gigabit Ports(Data in), 4 x gigabit PoE Ports(Data + PoE Out), Multi-Port PoE+ Injector up to 100m(328 ft.), Add PoE+ Power to
Amazon.com: PoE Texas 4 Port 24V Passive PoE Injector with 24V 30W UL/FCC Certified Power Supply - Gigabit Injector - Passive Power Over Ethernet Multi Port PoE Adapter for Ubiquiti, Mikrotik, 24
WiFi Texas Gigabit 4 port PoE Injector with 24 volt 30 watt power supply
Intellinet 4-Port Gigabit Ultra PoE Extender (561617) – Intellinet Europe
4 Port PoE Injector PoE Power Adapter Ethernet Power Supply for IP Camera | eBay
AV-POE4 4 Ports PoE/PoE+ Switch | AViPAS Inc.
TRN TPE-147GI: Power over Ethernet (PoE+) Gigabit Injektor, 4-Port at reichelt elektronik