AXIS 30 W Midspan AC/DC is for installations where mains power is not an option. With a power input of either 10-28 V DC or 24 V AC, it can deliver up to IEEE 802.3at (30 W) to your network device. 24 V AC can be needed in harsh environments where new cabling or installations are not possible and you need to retrofit box, dome or PTZ cameras. 10-28 V DC can be used where battery back-up is needed or for solar-powered installations. Or when the network device is built in another equipment and is powered directly from it.