Features: Color display: The host uses a 1.7-inch TFT color display and touch keyboard, with 6 languages that can be switched (English, German, Italian, Russian, Spanish, French), voice prompts for operation, easy to learn and use. Tuya APP remote control: Controlling the host through Tuya's APP can realize the linkage function with other products that can connect to the Tuya APP, and support the IOS/Android operating system. GSM and WIFI dual network alarm: The alarm host can be connected to 2.4G signal wifi, and can be used by inserting a 2G signal SIM card. The host can be used as an ordinary mobile phone and can directly make calls on the host. Wireless connections: The host is connected to the Sensor wirelessly, saving the trouble of wiring. The host can learn 100 remote controls and 100 Sensor. Low battery reminder function: The host will send information to the user's mobile phone when the battery is low or power is off. 6 groups of emergency contacts: Insert a SIM card with 2G signal, the alarm host will actively dial the 6 groups of phone numbers set by the user when an alarm occurs; the set number will not be lost when the power is off. 4 groups of timed arming and disarming: Flexible timing settings need to arm and disarm time, functions eliminate manual and frequent arming and disarming, and truly intelligent and fully automatic control. Connect to Alexa: Arm and disarm Alarm with your voice and get mobile alerts about the Door/Window Open or smoke alarms. Accurate Alerts: If thieves invade, W18 WIFI alarm system will issue a 110dB alert ,warn neighbors and deters potential intruders. Built-in Siren and With 110db wired siren. 6 languages can be switched: English, German, Italian, Russian, Spanish, French. Package included: 1 x Alarm Panel