https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
WL-06Dd2D Door Entry System

WL-06Dd2D Door Entry System

Xiamen Genway Security Technology Development Co., ltd
Region: China
Update: 05/22/2007
Key Specifications
Product features:

(1)One door station can support up to four indoor phones.

(2)Double Ding Dong Ring.

(3)Remote door unlocking.

(4)Nameplate changeable;

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