Ubiquiti Instant 802.3af Passive PoE to 802.3af Adapter - 48V DC Input - 24V, 500 mA Output - 1 x 10/100/1000Base-T Input Port (s) - 1 x 10/100/1000Base-T Output Port (s) - Newegg.com
48V 24W PoE Injector Power Over Ethernet Adapter 802.3af IP Cameras, VOIP Phones | eBay