Based on this product's specifications, here are some alternatives and similar models
PoE Injector OEM POE4PG — 4-port Gigabit Power over Ethernet injector
Summary description:
OEM POE4PG is a 4-port Gigabit Power over Ethernet (PoE) injector that supplies both data and power over Ethernet cables to compatible devices. Designed for powering cameras, access points and VoIP phones, it provides four Gigabit RJ45 ports with PoE delivery per port. Useful for installations lacking PoE switches, it simplifies deployment and reduces separate power cabling.