F41 Tuya APP Alexa WiFi + 4G Wireless Touch Keypad DIY Home Security Alarm System
Advantage of 4G alarm system: Australia, United States, Canada has cut the 2G sim card service. And United Kingdom, Mexico, Euro Union, ect will cut the 2G sim card in coming years. Without 2G networks, 2G/GSM only alarm system will fail to achieve it's major function, remote control through calls and SMS. To provide customers with longer alarm system lifespan, our company is launching a series of it's 4G alarm system which are both 4G/3G/2G(GSM) Network compatible. The 4G alarm system will work with United States, Australia, United Kingdom, Euro Union, Canada and most countries' 4G Sim card(Except China, Japan and Korea). The 4G alarm system support use 4G sim card to receive SMS message or phone call to remote control the alarm system(2G alarm system not support sim card function).
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