https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
P&H S12 Photoelectric Smoke Detector

P&H S12 Photoelectric Smoke Detector

Shenzhen P&H Electronic Co., Ltd.
Region: China
Update: 05/09/2012
Key Specifications
Features:

* Stainless steel inner housing for high ANTI-RFI

* Dual LEDs for 360-degree visibility

* Two or four wire optional

* Sleek, low-profile housing design

* Low power consumption, high precision and stability

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