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Stalwall D21 Smart Door Window Sensor to Effectively Prevent Intrusion & Theft

Excellent: High sensitivity and fast responses; Demolition alarm to prevent illegal removal; Establishment of linkage for multiple smart home devices; Eight months of battery life.
Competitive: It can prevent illegal removal by giving out the demolition alarm, so you can get notified in case someone finds the door sensor. Reliable Tuya App helps you to establish connections between many smart home devices to build a smart home. Powered by two AAA batteries (removable), it can last for over eight months. View More View Less

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