[Alexa and Google Home compatible] - App sends alarm message and call. Support voice control with Amazon Alexa or Google Assistant after successful connection. You can remotely control with iOS and Android phones or tablets.  [24/7 Monitoring] The door glass sensor can monitor your home all the time. Use it on doors, windows, cabinets, drawers or anywhere you want to be notified when it's opened or closed. Catch every activity and send an alert to your Android or Apple phone. It is easy for you to monitor your home security anytime, anywhere. The device should be used within the signal range of the WiFi router. [Lifestyle intelligent] high splitting power allows up to 1 cm when the door/window is closed. No annoying cable and power supply, can be installed with tape or screws (included) in any difficult situation. It can also perform automatic control with other smart devices. When the door is opened at night, the door sensor and the smart socket can be connected with each other to turn on the light. [Instant Alerts] 2.4G Wi-Fi connection. When it is triggered, for example, open, close or tampered with, an immediate notification to your phone will be sent in 3-10 seconds depending on internet speed. The built-in snooze function allows the door sensor to automatically connect to the network after resetting the wireless router.  The device should be used within the effective signal area of the wireless router. Do you have other advanced features? 1.Check door/window history, share the idea with a family member with just one click. 2. Low power consumption, up to 5 years of battery life. 3.Compliant with CE, FCC and ROHS standards. 1 battery: AAA1.5V x 2 (not included) 2 Standby current: 5uA 3 Standby time6 - 10 months 4 types of wireless connection: 2.4GHz 5 Size: main body: 7.2cm x 1.9cm x 3.0cm 6 Small body: 1.4cm x 1.5cm x 4.5cm 7 Safety certificate: FCC, CE, Rohs 8.Color: White 9.Quantity sold: 1 piece Connection: 1 Make sure the network is 2.4G. If there is a router with 2.4g and 5G, please turn off the 5G network and reconnect. Be as close as possible to the Wi-Fi source to ensure that the network cannot be connected due to signal problems. 2 Download the "Smart Life" APP, click in turn : HomeUpper right corner + (Add device) Add automatically Security and sensor Contact sensor (wifi). Note: Please do not choose ZigBee and Bluetooth. 3 Make sure you are in fast flashing mode to connect (long press the main button on the device for 5 seconds to switch between fast and slow flashing mode), click "Confirmed indicator flashes quickly " and enter the WIFI password p