https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
EM-NH500 Electromagnetic Lock

EM-NH500 Electromagnetic Lock

GIANNI INDUSTRIES INC.
Region: Taiwan
Update: 05/02/2007
Key Specifications
Features:

- MOV provies spike and surge protection.

- Anodized aluminum housing.

- Groove template & housing for easy installation.

- Dual voltage 12 or 24 VDC (selectable).

- Anti-Residual Magnetism designed.

- Complete mounting hardware included.

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