Ideal when AC power is not available; Reduces costs by using existing CAT-5 cable to provide both power & data; Injector can be used to connect a wireless access point, IP phone, network camera or any IEEE 802.3af PoE powered device to a switch; Designed to protect equipment from short circuits (short GRND), current overloads over 450mA & high voltages exceeding 52V; 3-year warranty;