https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
LD-46 Personal Alarm

LD-46 Personal Alarm

SHINCLUSTER ELECTRONICS CO., LTD.
Region: Taiwan
Update: 11/05/2008
Key Specifications
These alarm is used as a necklace alarm,operated by a pair of UM-5 batteries to make it functional.

Item no.: LD-46

Tone :Siren Tone

Siren Output :110 dB (at 1 ft.)

Battery: (UM-5) * 2

Color: Black.Yellow.Orange or others

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