1、Message Push: When you leave home, if the door and window are opened or invaded by external objects, it will push you a notice, and you will immediately find the abnormal situation in your home. 2、Exquisite Appearance: Small and compact appearance, reasonable size design and optimized internal structure bring you comfort, beauty and enjoyment. 3、Intelligent Linkage Scenario: When there are no people at home, strangers break in, gas leakage and other potential safety hazards can not be ignored, turn on the smart home mode to comprehensively detect abnormal conditions at home and protect the safety of family members and property. 4、Home Lighting Mode: When you go home at night and open the door, the lighting in the living room is automatically turned on and the curtains are closed. You don't have to look for switches everywhere. 5、Multi Scenario Application: Suitable for families, stores, offices, factories and other places. It is made of high quality ABS material, which is durable and can be used indoors and outdoors. 1 x Alarm1 x Sensor1 x Manual1 x Needle Item Type: Smart Door Window SensorMaterial: ABSProduct Size: Approx. 4 x 2.5 x 1.2cm / 1.6 x 1.0 x 0.5in, 2.6 x 1 x 0.9cm / 1 x 0.4 x 0.3inWeight: Approx. 35g / 1.2ozOperating Temperature: -10℃ to 50 ℃Working Humidity: 0% to 95%RH (No Condensation)Battery: CR2032 Button Battery 150mah (Included)