Answer your door no matter where you are from your smartphone with 1080p HD day and infrared night video and two-way audio. Experience long-lasting battery life, custom alerts, privacy settings, and more. Get alerts when motion is detected or someone presses Video Doorbell. Pair with the Sync Module 2 (sold separately) or wire to engage any time. Designed for every home, go wire-free or connect to existing doorbell wiring to also sound in-home chime. Set up yourself in minutes with the two included AA lithium batteries then connect to wifi in the app. Works with Alexa — get notified when your doorbell is pressed and motion is detected. When wired, see, hear, and speak to visitors. Doorbell Features