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eufy Security Entry Sensor E20, Window & Door Alarm, 5-Year Battery | Dual-Side Detection, Instant Alerts, Bypass Button, 656ft open-air range, HomeBase 2/3/Mini/Pro required, No Monthly Fee

Price last checked 2026-10-21. Prices change often — confirm on Amazon before buying.

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About this item

• [5-Year Battery Life] Up to 5 years of continuous protection from a single CR123A battery. No frequent replacements, minimal maintenance.
• [Instant Alerts & Smart Automation] Hear instant chime alerts from your HomeBase when a door or window opens. Trigger connected cameras or lights automatically. Requires eufy app v6.0.00 or above.
• [Convenient Bypass Button] Simply press the bypass button to temporarily deactivate the sensor, allowing you to open the door without triggering an alarm. Your other sensors remain active.
• [Dual-Side Detection] Supports both left and right-side installation for quick, error-free setup.
• [Expansive Wireless Range] Provides a stable connection with HomeBase at open-air distances of up to 656 ft (200 m).

Product details