BATTERIES NOT INCLUDED: Use four alkaline or lithium AA batteries NO WIFI, NO INTERNET, NO POWER? NO PROBLEM! Battery Powered Security Siren Outdoor Alarm Controller 2, Battery-Powered - Ubuy Door Sensor Starter ) as well as extended battery life (up to 10 years!, ). LifeHackster tests YoLink's smart outdoor siren: 110dB, battery-powered, 1/4 mile range. See how it outperforms others in this versatile home security demo LONGEST RANGE, BY FAR! 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). 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! Our patented Control-D2D device-to-device pairing, over our LoRa-based wireless network, allows for devices to be paired to each other, in such a way they will continue to operate, even if WiFi is flaky, the internet goes down, or the AC power goes out! Our patented Control-D2D device-to-device pairing allows for establishing device behaviors in advance, ensuring functionality even with the loss of WiFi, internet and AC power*, making it perfect for your critical (must-work) operations, including but not limited to water leak detection & automatic shut-off and intrusion detection and general security systems. YoLink Home Security System: A Hands-On Review | by Smart Home LLC This technology, LoRa, short for Long-Range, by Semtech, is unique to the smart home market, and provides benefits that include over a 1/4 mile range, superior obstruction penetration (including metal! Only YoLink, powered by LoRa is capable of up to 1/4 mile range in open air, allowing you to locate the siren virtually anywhere on your property, with no concerns about WiFi signal or dependability Only YoLink, powered by LoRa is capable of up to 1/4 mile range in open air, allowing you to locate the siren virtually anywhere on your property, with no concerns about WiFi signal or dependability , START SMART!
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