Description SNZB-04 Description: Ewelink SNZB-04 is a ZigBee two-in-one wireless door/window sensor that can be placed on your door or window to notify you with an alert notification if your door or window is opened or closed, providing an extra layer of security to your home. Reminds you when the door/window is open and closed. Sync the opening and closing status of the door/window in the APP. Can make ZigBee and Wi-Fi devices keep together. Control the light with an action. Support adding Ewelink camera to see what is happening in your home. Share control allows other users to quickly control the connected device. 3-month history record check. Low battery notification. Easy installation with stick. Color: White Material: Plastic Package Contents: 1 x Wireless Door and Window Sensor (SNZB-04) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.