door sensor

Ring Battery Doorbell (newest model) - Retinal 2K with wide-angle video, up to 6x Enhanced Zoom, Two-Way Talk, and Built-In Battery - Speckled Gray

Ring Battery Doorbell Plus (newest model) - Retinal 2K with wide-angle video, up to 6x Enhanced Zoom, Night Vision, and Quick Release Battery Pack

Ring Starter Set with Battery Doorbell and Indoor Cam: Security Wi-Fi System, 2 Cameras

Blink Video Doorbell System with Head-to-Toe HD View, Two-Year Battery Life & Simple Setup, Sync Module Core included

LED Camera Lighting Accessory with Battery Light and Phone Mount - heyday™ Black: Camera Lighting Accessory

Blink Battery Doorbell 2K+ (Black) Sync Module Core included — Wireless video doorbell, 2K resolution, enhanced audio

Blink Outdoor 4 Wireless Smart Security Camera, 2 Year Battery Life, 1080p HD , Two-Way Talk, Sync Module Core Included Camera System

Ring Essential Security Set with Battery Doorbell Plus and Indoor Cam - Satin Nickel and White: Motion Activated, Controlled by Smartphone App

Ring Outdoor Cam Plus Battery 2K Video with Low-Light Vision and Flexible Mounting - White: Motion Activated, 2-Way Talk

Ring Chime Pro: Compatible with Ring Products, Built-In Nightlight