The eufy Flood & Freeze Sensor E20 protects your home from water damage and frozen pipes. You connect the device to the app as soon as you receive it. To use this sensor, you always need a Eufy HomeBase (HB Pro, HB3, or HB2). As soon as the sensor detects water or a temperature that's too low, you'll get a notification right away via the Eufy app. This way, you can take action immediately and prevent damage, even when you're not home. Because the sensor is wireless, you can easily place it in your basement, bathroom, or near pipes. The battery lasts up to 5 years, so you won't have much maintenance. With this sensor, you can be sure your home is protected against leaks and frost. That gives you peace of mind and helps prevent unexpected repair costs.