Unlike analog cameras, IP cameras can plug directly into your computer or DVR. They use an IP address to transmit video through a network using Ethernet/CAT5 cable. Because IP cameras can connect to any computer, DVR or existing network little to no additonal hardware is required, reducing your system cost. The IP cameras include set-up and viewing software. Included IP camera software will support up to 16 cameras. Because IP cameras can connect into a network you can login remotely and view or playback video. You can also set-up email to notify you of motion. Power adaptor included with all IP cameras.