The POE-GSH2004L-370 is a 20+4-Port Gigabit Ethernet Web Smart PoE Switch. It can automatically detect the presence of an 802.3at/af compliant powered device (PD) and provide power through the port. The switch provides up 30W per PoE port and can be used to power AP, IP phone, IP Cam and other PD devices. After enable and set up the Device Guard function, the switch can monitor PoE IP Cameras and Access Points for activities. When a device crashes and not responding, it will reboot the device automatically. It keeps your wireless and IP camera network running smoothly without the need to send expensive technician for service.