https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
Smoke Detector Alarm

Smoke Detector Alarm

Shenzhen Victa Industrial Co . , Ltd.
Region: China
Update: 08/17/2011
Key Specifications
Features:

MCU Processing.

High reliable sensor.

Auto-Detect Sensor Failure.

Loud Alarm 85dB.

SMT Design, High Stability.

Test Button For Easy Monthly Testing.

Mounting Hardware Included, convenience for installation.

Using 9V battery or 12V DC Power Supply.

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions