Features: Remotely monitoring alarm: When accident invasion,the phone remotely grasp the situation, high decibel live alarm through the host timely dial,send SMS notification, APP message push. Two-way voice intercom function: Make and receive calls, voice messages, SMS remote control, provide you with an intelligent life. Combined series of Home System alarms: Build up a comprehensive prevention and control system. Up to 100 sensors can be added, including PIR Detectors. Door sensor, Smoke Detector, CO Detector, etc, meet all your requirements. Arm and disarm regularly, saving time and effort. Arming and disarming can be set according to your needs. Remove the annoyance of repeating settings every day. Simple Design: Environmentally friendly silicone keys, good touch feel. Specifications: Item: WiFi GSM Alarm System Material: ABS Color: White APP: Tuya Power Adaptor: DC 5V 2A Static Consumption: <= 55mA Alarm Current: <= 450mA Output Current: DC5V 150mA Wireless Frequency: 433MHz Encoded Mode: 1527 GSM Frequency: 850/900/1800/1900MHz Siren Volume: 110dB Temperature: -20 - +55 Humidity: 40%-80%RH Max Wireless Sensors: support max 98 wireless sensors Max Wired Sensor: support max 8 wired sensors Max Remote Controllers: support max 5 remote controllers Size:Approx. 18 * 12.8 * 2.8cm Packing Size:23.2 * 15.4 * 9cm Packing Weight: 879g Package List: 1* WiFi GSM Alarm System 1* PIR Detector 1* Siren 1* Door sensor 2* Remote Controller 1* Adapter