Passive PoE Injector Switch / PoE Power Swith
. 9 Ports (1*Uplink, 8 *PoE) 10/100Mbps
 . Midspan Mode-B Unsolicited Power(4,5+/7,8-)

Included:
 power adapter: 24V 5A  120Watt
24V Power over Ethernet Max cable length of 60 meters
Wall Mount

Compatible 24V Ubiquiti PoE
UniFi AP/UAP
NanoStation M2
NanoStation M3
NanoStation M365
NanoStation M5
NanoStation Loco M2
NanoStation Loco M5
NanoStation Loco M9

this is a special PoE Switch with 24V DC out
Do Not compatible with 802.3af
Do Not compatible with 48V poe device  

It could work only on some special customized 24V PoE device   (such as  Ubiquiti 24V PoE device)

If you can not figure out the PoE voltage of your device, we suggest you to buy 48v PoE Switch which can follow 802.3af agreement.