From the office, workshop floors of S4A’s factory, we’re pausing to mark our 16th anniversary—and we owe this milestone entirely to you:
To our factory team: Thank you for the long shifts on production lines, precise checks on every access control component, and the quiet dedication that keeps our assembly bays running smoothly. You’re the hands that build the quality our partners rely on.
To our trusted suppliers: Thank you for the timely deliveries of quality materials that keep our lines moving without hitches. Your reliability isn’t just a convenience—it’s the backbone of our ability to meet deadlines for our clients.
To our valued clients: Thank you for choosing the products built right here in our factory, and for the feedback that pushes us to refine our craftsmanship. Every order you place, every detail you share, shapes how we grow—and we don’t take that trust lightly.
16 years of making secure, reliable access solutions wouldn’t exist without this tight-knit network. Here’s to many more years of building, collaborating, and delivering what matters—together.

Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.
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