https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
EM250R Electromagnetic Lock

EM250R Electromagnetic Lock

LINE KUAN INDUSTRIES CO., LTD.
Region: Taiwan
Update: 11/20/2006
Key Specifications
. C54Door monitoring output (Relay Form C) with LED indicator

. Build in remote control Module

. 4 buttons in total on remote control for setting up

. 4 set of door locks.

. Surface magnet size: L251 X W47 X H25

. Strike plate size: L185 X W38 X H12

. Hold time setting: 10~20 sec. (default 10 sec.)

. Voltage - electric current : 12VDC - 400mA , 24VDC - 200mA

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