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: 1 pc (power supply). One passive adapter is included with the RJ-45 connector and a 2.1 / 5.5mm power connector. Cannot be used when connecting POE switches!