https://www.asmag.com/project/hikvision_large-scale_ai_survey/

Product Info

EYSTON SD-191H Photoelectric Smoke Detector

U.P.TECH CORPORATION CO., LTD.

Region: Thailand

Update: 07/25/2013

Key Specifications

* Certified to UL217
* Photoelectric sensor-advanced photoelectric
* sensor will detec visible-particles
* Loud 85 dB alarm signal in 10 ft
* Operated with single 9VDC battery
* Self-test button
* Battery missing indicator
* Low-battery warning indicator
* LED operation indicator
* Environmental Friendly
* No radioactive materials
* Easy installation

https://www.asmag.com/project/dahua_xinghan_large-scale_ai_models/