The eufy Flood & Freeze Sensor E20 protects your house from water damage and frozen pipes. You can connect your device to the app when 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 too low temperature, you get a notification via the eufy app. This way, you can take action right away 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 2 years, so you have little maintenance. With this sensor, you're sure that your house is safe from leaks and frost. This gives you peace and prevents unexpected repair costs.