YoLinK LoRa Smart Door Sensor Starter Kit: 1/4 Mile Open-Air Range, Door Left-Open Reminders, Text/SMS, Email, App alerts, 5 Years Battery Life, Alexa, IFTTT, Home Assistant

A SMART START! Everything you need to get started: one YoLink Hub and two Door Sensors.

Batteries are included and preinstalled, good for up to 5 years between battery changes.

Supports 300+ devices from our full product line.

Add more hubs for large homes, high-rise condo buildings, etc.

WHY PAY A MONTHLY FEE, when you can secure it for free? Self-monitor and save when you take advantage of our many ways to be notified of alarms and off-normal events in and around your home or business.

See Know Now! for more information! THAT WAS EASY! Installs in moments: scan the sensor's QR code, give it a name, peel off the pre-applied 3M brand mounting tape protective plastic, press the sensor and magnet to the door and frame, and you have added security to your home or business! MORE THAN JUST A DOOR ALARM! Place a sensor on each exterior door and window to Protect Your Perimeter Activate and control lighting.

Place a sensor on your fridge/freezer door or lid and know if it was left open, to prevent food loss.

Track activity in your home or business.

Keep an eye on children and elderly loved-ones.

Use the sensors to protect liquor & medicine cabinets, gun safes, storage lockers & boxes.

DOOR AJAR! Our unique Door Left-Open reminder can be used to alert you to a door or window left open too long! You define the maximum time.

Use our SpeakerHub, our audio hub, to play a tone or message, alerting you when a door is opened or left open too long.

NOT YOUR FATHER'S DOOR SENSOR! This is a sophisticated electronic device, utilizing the latest technology.

24/7 cloud server device supervision monitors your system for online presence, signal strength and battery level, to ensure it will work when you need it!