DW2-Wi-Fi,Wireless Door Window Alarm Sensor With Phone Alerts, No Hub Required, Works With Alexa, Low-Battery Reminder, 2.4GHz WiFi Connectivity.

[No Gateway Required]Easily pair the sensor to the eWeLink APP, then control it remotely through Wi-Fi, without the need for an additional gateway. [Battery Alert]When the battery is low, you will receive a notification on the APP to avoid missing security alarms due to a low battery. [History Log Check]Access up to 3 months of automatically saved record logs directly in the app. [Real-Time Sync & Camera Linkage]Monitor the sensor's real-time status in the app. You can also bind a camera to visually confirm any activity. [Quick & Easy Setup]Install in seconds with the included adhesive-perfect for door frames, window sills, and more.