Feature: 1. Voice and Alarm: Supports dual way voice intercom function, suitable for Tuya hardware, supports up to 99 defense zones, and provides accurate and immediate alarms when illegal intrusion is detected. 2. Alarm Notification: With a high decibel alarm, the sound can be up to 115dB. Built in door bell function, with voice prompt function and remote mobile notification, which is convenient and practical. 3. Wide Applications: This WiFi smart alarm system supports for Tuya Cloud, intelligent voice control, and provides APP push. Widely applicable to households, apartments, villas, hotels or offices, etc. 4. Multiple Functions: Equipped with main power outage alarm, backup battery shortage alarm, sensor battery low voltage alarm, built in anti disassembly alarm function, and warning of door and window not closed. 5. Built in Battery: This alarm has a built in 1000mAh lithium battery, and the remote control has a 200mAh CR2025 battery, making it convenient to use anytime, anywhere without location restrictions. Specification: Item Type: Home Alarm System Input Voltage: DC5V (Micro USB Standard Interface) Wireless Frequency: 433Mhz 2.4G 125K Wireless Encoding: eV1527 WiFi System: 2.4G IEEE802.11b/g/n Wireless Standard Alarm Battery: 1 x 3.7V Lithium Battery 1000mAh (Built in Battery) Remote Control Battery: 1 x CR2025 Battery 200mAh (Built in Battery) Main Door Sensor Battery: 1 x CR2025 Battery 200mAh (Built in Battery) Working Temperature: -10-55℃ Relative Humidity: