for delivering power to an 802.3af or 48 volt device over 328ft of network cable. This scheme allows power to be carried on 10/100/1000 networks on CAT5E, CAT6 or CAT7 Ethernet network cable. power is any supply from 10v to 30v, and the output voltage is 48 volts. Power into the device is either from the 2.1mm DC connector - OR - from the RJ45 male pins 4,5 + (plus) and 7,8 - (minus). The device passes 10/100/1000 Ethernet. Any battery (12v or 24v) or passive PoE injector can now 48 volt device directly. Plug it into spare ports on a multi port Passive PoE injector, or connect it to any 12v to 30 volt power source - and Phone, WiFi-Access Point, camera or other device. The higher DC voltage of 48 volts compared to 12 volts, means the wire loss is reduced by a factor of 16 , thus carried with less loss over the spare pairs of the 10BASE-T or 100BASE-T network cable. The remote device extracts the DC voltage from cable and powers it's internal electronics. If power is applied to the 2.1mm input - power be isolated from the male RJ-45 - so it can be plugged into a switch or router. The output voltage of 48 volts comes on pins 3,6 + (plus) and 1,2 -(minus) of the female RJ-45 in order to power any 802.3af device. Data + Power in: RJ 45 male connector DC input connector: 2.1mm x 5.5mm adapter Data + Power out: RJ 45 Female connector Network Type: 10/100/1000 Data Pins: All 4 pairs Power Pins input: 4 & 5 + and 7 & 8 - (Mode B) Input Voltage: 10v to 30VDC Output Voltage: 48v +- 2% at .2 amps Power Pins Out: 3 & 6 + and 1 & 2 - (Mode A) Operating Temperature: 0°C ~ 50°C Color: Black Material: ABS Package Contents: 1 * Gigabit POE converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.