ECONOMICAL SMART SIREN: many features packed into one compact loud siren, just a little over 3 inches wide! | MULTI-FUNCTION! Use as a panic alarm, as a home intrusion siren, have it activate if a door or lid is left open too long, and use it as an alarm for water leaks* and high or low temperature and humidity* or all of the above! *Additional YoLink devices required, not included. | WHY PAY A MONTHLY FEE if you can secure it for free? See below for the many ways your siren can respond and for you to be notified of off-normal events, from a high-temp alarm, to motion detected in the back yard, or a garage door left open too long (other YoLink devices required, not included) | DEVICE-TO-DEVICE PAIRING allows for two or more (up to 128!) devices to be paired together, in such a way they will perform their action even without WiFi, internet, and power! (Battery-powered or backed-up devices). Perfect for security and other critical functions: pair your water leak sensors to your Siren Alarm, and to your Smart Motorized Valve. | EVEN BETTER with a SirenFob! Pair one or more siren products to your SirenFob, then pair one or more alarm products (such as door, motion, vibration sensors - ideal for vehicles, RVs, and other mobile applications or where internet is not available. *Additional YoLink devices required, not included. Search for B0BRCX6HVK | START SMART! A YoLink hub is required for full functionality, including for the app to work, to check battery level, etc, but your hub is compatible with a growing family of smart products for home and business! Search for B0BJJZH511 for a starter kit with YoLink Hub or search B09FSS95G9 for a SpeakerHub (our audio, talking hub). | BATTERIES ARE INCLUDED! | LOOKING FOR SOMETHING FOR OUTSIDE? Search B092QR82P1, B09V2DXPPW, B0BWYLT3JB, B0BZHPQ1PK | WANT TO USE YOUR OWN STROBE, BELL, BUZZER, ETC? Search for B0BWYLWWV6

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! | 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! | 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! (Hub required, for full functionality) | DEVICE-TO-DEVICE PAIRING: a unique feature, two or more devices can be paired together. Even if the internet is out and the power is down, they will carry out their paired actions. Pair your door sensors to a Siren Alarm, then turn it off when you want to "disarm" your system. Use a SirenFob or FlexFob to control your siren. Make your own custom security system! | DON'T TRY THIS WITH WiFi! LoRa is short for Long-Range. Boasting up to a quarter-mile open-air range, and operating at the 900 MHz band, YoLink devices can be placed where your WiFi probably can't go, such as in basements, separate buildings, even on RVs and boats stored on your property! Prepare to be pleasantly surprised! | SMART OR STANDALONE, you decide: for full-functionality and the full potential of your Door Sensor, a hub with an internet connection is required. Or, you can use device-to-device pairing to pair your door sensors directly to a siren - you can then manually arm/disarm your siren with a SirenFob (search B0BRCX6HVK). Search B09FSS95G9 for the SpeakerHub, or B07TQLKQLJ for the Original Hub. | BATTERIES ARE INCLUDED! Six AA batteries, preinstalled, good for 2+ years standby, are included! | Looking for a starter kit with hub? Search B0BZ88QB5P for SpeakerHub, or B088ZFGX3S for regular Hub. Looking for a Siren Alarm? Search B0887SMPKK. Looking for a garage door sensor? Search B07Z7QQV8K. Looking for a gate sensor or door/window/lid sensor for outdoor use? Search B08P1VQMCR

Audible Notifications - be informed of system alerts and events with your selected sounds/tones as well as text-to-speech messages like “the garage door is still open!” | 100-in-1 Audible Device! Customizable tones/sounds and custom spoken text-to-speech messages means your SpeakerHub can act as a driveway alert, security siren, water leak alarm, door chime and you’ve-got-mail announcer! | Smart Design - SpeakerHub is powerful yet compact and portable. Handsome and measuring less than 3 inches across, it will look great anywhere in your home. Simply connect it to WiFi (only), and USB power (with the included AC adapter) | Private & Secure - SpeakerHub is smart, but it does not have a microphone and can not listen. Be secure in your privacy and safely place this smart speaker anywhere in your home or business | Requirements - Android or Apple smartphone, stable WiFi connection (SpeakerHub does not have an Ethernet port), and USB power or an AC outlet nearby for the plug-in power adapter