This category of Alarm.com cameras offers a hardwired PoE setup, meaning any Power over Ethernet (PoE) supported router can be used to power the devices. In situations where you do not have a PoE router or modem, these cameras do offer a connection vis the ADC-VACC-PWR-VC101 power adapter (sold separately). If by chance you are looking to use an Alarm.com SVR, PoE cameras are the only type that will connect to an SVR. Some PoE cameras also offer onboard recording using an SD card if you just want local recording per camera. The WD Purple Surveillance Grade SD Cards are the recommended SD cards for Alarm.com cameras.