This PoE doorbell uses only one cable to ensure a stable network and continuous power supply simultaneously. You can also connect the doorbell to your existing doorbell wiring. A 15° wedge is included to allow you to adjust the angle. The doorbell can alert you only when a person is detected, ignoring insignificant, non-human passersby. You can also set a motion zone to darken areas that are prone to unnecessary alarms. The infrared LEDs enable high-quality night recordings, so you know who is there, even in the dark. The Reolink Video Doorbell PoE features built-in microphones and a speaker. Take your time to greet the visitor before rushing to the door, deter unwanted visitors without delay, or speak live with visiting friends when you are not at home. The doorbell camera starts recording before the actual detection occurs. The 6-second color video footage before the alarm can be very helpful: learn about possible causes or increase the likelihood of criminal identification. You can store your recordings locally on a microSD card (up to 256 GB) or on a Reolink NVR. Package includes: 1 x PoE video doorbell, 1 x chime, 1 x mounting plate, 1 x wedge, 1 x mounting hole template, 1 x bridge cable, 1 x 1-meter network cable, 1 x pack of screws, 1 x quick start guide.