https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
Anvox Outdoor Battery Back-up Siren with Strobe

Anvox Outdoor Battery Back-up Siren with Strobe

Anvox Alarm Systems
Region: China
Update: 07/14/2011
Key Specifications
Features: 
● Two-way tamper switch protection
● Twin piezo sounders with 120 DB at one meter 
● Positive, negative siren trigger 
● Battery backup 
● LED diagnosis indication
https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions