https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
LD-46D Door Protector (Door Type)

LD-46D Door Protector (Door Type)

SHINCLUSTER ELECTRONICS CO., LTD.
Region: Taiwan
Update: 11/04/2008
Key Specifications
These alarm is used as a door protector,operated by a pair of UM-5 batteries to make it functional.

Item no. :LD-46D

Tone :Siren Tone

Siren Ouyput: 110 dB (at 1 ft.)

Battery :(UM-5) * 2

Color :Black

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