Answer your door anytime, anywhere from your smartphone with 1080p HD day and infrared night video and two-way audio. Experience up to two years of powerful battery life, custom alerts, privacy settings, and more. Designed for every home, go wire-free or connect to doorbell wiring to also sound your existing in-home chime. Includes Blink Video Doorbell, Sync Module 2, 2 1.5V non-rechargeable AA lithium metal batteries, mounting kit (including corner mount, screws, and anchors), USB cable, and power adapter.