Introducing The ROSA . It can be the world's smallest and wireless smart alarm siren HOST !!
Any detector or accessories can work with it (Which is very common every where), 
any issue or button control will trigger the ROSA, and quick red+blue light flashing with super loud siren sound attract every body's attention.
Easy, convenient, and secure, Great for many field of life using.

ROSA Wireless Standalone Alarm Siren Multi-function Home Security Alarm Systems
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AS Standalone Alarm Host
Meanwhile a poweful wirelsss siren
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As wirelss Siren
Rael Time SOS Function
Roza Overview
Brings you more features
Give your Family Security
Specifications