
SanJie
SanJie Door Sensor Chime for Door Opens, Door Entry Chime for Business/Home/Office/Store,800 FT Range,55 Chimes 5 Adjustable Volume Door Ringer Alert Alarm 1 Receivers +1 Sensors

eufy Security
13%OFF
eufy Security Entry Sensor, Detect Open and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-Use, Requires HomeBase

ecobee
21%OFF
ecobee SmartSensor for Doors and Windows 2-Pack, White

Aqara
Aqara Door and Window Sensor P2, Matter Over Thread, Requires Matter Controller & Thread Border Router 2-in-1, Contact Sensor, Local Automation, Supports Apple Home, Google Home, Alexa and SmartThings

YoLink
Yolink Smart Wireless Door Sensor, APP Alerts Smart Door Window Sensor Smart Home Security System, 3 Packs

YoLink
YoLink Smart Home Starter Kit: 4 Door/Window Sensors & Hub Kit, Compatible with Alexa, IFTTT, App for Remote Monitoring, Control and Alerts, Door Still Open (Door Left Open) Alerts

ecobee
Ecobee3 Lite Smart Thermostat with Whole Home Sensors (1 Door/Window, 1 SmartSensor)

CPVAN
CPVAN Home Security System, Wireless Door Alarm with APP Alert, Remote, Door/Window Sensor, Base Station and Siren 8 Kit, for Kids Elders Safety, Fit House, Apartment. Works with Alexa

YoLink
YoLink SpeakerHub & Two Door Sensors Smart Home Starter Kit – Audio Hub Plays Tones/Sounds, Spoken Messages, LoRa-Powered ¼ Mile Range, Compatible with Alexa, Google, IFTTT, WiFi Required