This device is designed for convenient power transmission over twisted pair. Not only for IP cameras but also for other devices that are connected via a twisted pair cable: Switches, IP camera routers. Technical specifications: Voltage 0t 5 to 12 Volts. 12 months warranty. Package contents: 2 pcs (father and mother power). Included are two passive adapters that are equipped with RJ-45 connectors and a 2.1 / 5.5mm power connector. Cannot be used when connecting POE switches!