YBJ12-Piece Alarm System — Wireless Smart Home Security System | Supports 99+ Wireless Zones | Easy Installation | Mobile App Control | Compatible with Surveillance Systems | Alexa Compatible

Easy Installation No professionals required. No wiring or drilling needed. Simply mount the main unit on the wall (screws included) and connect to power. Supports expansion to 100 learning/storage/location units. Flexibly configure remote controls, RFID cards, and wireless detectors.
Mobile Remote Control View and control your security system anytime via smartphone (requires SIM card or WiFi). Arm/disarm, voice monitoring, and intercom functions available.
Intrusion Protection When triggered, accessories instantly send wireless signals to activate the alarm system. It emits a high-decibel alert to deter intruders while simultaneously calling or texting preset contacts.
Built-in Battery The system remains fully operational even if wires are cut or power is interrupted. It continues to effectively deter intrusions during power outages.
Dual-Mode Network Support Compatible with 2G/3G/4G SIM cards (purchased separately) and 2.4GHz Wi-Fi networks (does not support 5G). Automatically switches to GSM communication when Wi-Fi power is lost.