Digoo DG-HOSA 433MHz Wireless 3G&GSM&WIFI Home and Business Security Alarm System, DIY Smart Alarm Systems Kits Infrared Motion Sensor Door Magnetism Alert with APP Control, Update Version;

Note:This alarm system need to work under good network environment,the message would delay about 3seconds.If the signal is not strong enough,will send the alert when the sensor is triggered,but you need to replace the battery if the sensor flash red light.
Push notifications setting and view all sensors' status from APP.Note for sim card:a.SIM card must support GSM(key point)b.The SIM card cannot be encrypted with PIN code(If there is,it can be used to unlock the PIN code on the phone)c.The device has the IMEI code,it will automatically active and identify the SIM card after plug in.