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.

Welcome to get to know S4A factory! We specialize in manufacturing a wide range of accessories for access control systems and automatic door units. Whether you're looking for cards, access control machines, or software, we've got you covered. Our one-stop procurement service means you can find all the corresponding hardware and software solutions right here, without the hassle of dealing with multiple suppliers. With 15 years of rich experience in production and operation, we have mastered the ins and outs of this field. We are proud to offer OEM and ODM services, tailored to meet your unique requirements. No matter how simple or complex your needs are, we are committed to providing you with high-quality products and professional services.We look forward to building a long - term and mutually beneficial relationship with you!Friendly ReminderPlease be informed of our company’s holiday arrangement for the 2026 Chinese Spring Festival as follows:Our factory will commence holiday from January 31st, 2026Our office will be closed starting February 7th,2026 (team building activities are scheduled for February 5th to 6th);All our business operations will resume fully on February 28th, 2026.During this period, our response to your inquiries may be slightly delayed due to the holiday schedule. Rest assured that we remain committed to serving you: you are welcome to leave us messages at any time, and we will get back to you promptly as soon as we have internet access.Thank you for your continuous support and understanding to S4A and our work. We appreciate your cooperation and wish you a joyful Spring Festival!Best regards,S4A Team

With 16 years of experience in the access control and security industry, S4A is no longer just a product manufacturer, but a trusted solution partner for its customers. Our core products – from access control panels supporting multi-protocol integration to fingerprint locks that seamlessly integrate with smart ecosystems – can be customized and optimized to meet our customers' individual needs. Our 16 years of industry experience allow us to better understand market pain points and how to create value for our customers with stable and efficient products. Choosing S4A means choosing a worry-free partnership experience.January 2026 has kicked off on a high note for us, as we recently secured a batch of Turnstile gate orders from one of our long-term partner clients. This encouraging start is a true reflection of the steady trust and recognition our Turnstile gate products have gained among our existing customer base.Daily, we receive at least one to two such Turnstile gate orders from our loyal clients—an ongoing testament to the reliability, quality, and performance of our products. These repeat orders not only highlight the strong cooperative relationships we have built over time but also underscore the market’s consistent demand for our Turnstile gates.We remain committed to delivering top-notch Turnstile gate solutions that meet and exceed our clients’ expectations, and we look forward to continuing this momentum of trust and collaboration throughout 2026.Again, I deeply appreciate your efforts and look forward to more opportunities to work with you. If need our support, pls contact as below:S4A INDUSTRIAL CO., LIMITEDContact Sales: Ms Anna ZhangTel:+86 755 29450011 EXT: 608Mob/whatsapp/Viber +86 134 10500721Skype:crypton0908Email: sales1@s4a-access.com

 In response to the feedback regarding slow card enrollment on our TF2 access control device, we've taken immediate and concrete verification steps to demonstrate the product's standard performance. We randomly selected a fully assembled TF2 unit directly from our production line, alongside a normal ready-to-ship unit picked at random from our warehouse—both are 100% representative of our mass-produced TF2 devices that adhere to S4A's strict factory quality control standards (as outlined on s4a-access.com). We captured clear step-by-step photos and footage of the complete user card enrollment process on these two units, showcasing the TF2’s normal, standard response speed during this core operation.  I'm super excited and all set! If you have any questions or need help later on, just let me know right away. I'm here 24/7, eager to help you out and make sure you have a great time! If you wanna know more products or require any additional information, pls kindly contact us as below:S4A INDUSTRIAL CO.,LIMITEDContact Sales: Ms Anna ZhangTel:+86 755 29450011 EXT: 608Mob/whatsapp/Viber +86 134 10500721Skype:crypton0908Email: sales1@s4a-access.com

S4A is a professional manufacturer and supplier specializing in high-quality access control systems and solutions. We operate our own production facility, allowing us to maintain strict quality control over every product, from design to delivery. Our expertise lies in providing reliable and innovative security products, such as the S4A EL-600 and EL-1200 series electronic locks, to partners worldwide. We are committed to authenticity, direct factory pricing, and robust customer support, ensuring our clients receive genuine products and dependable service. Choose S4A for security solutions built on real manufacturing expertise and a proven track record.If you wanna know more products or require any additional information, pls kindly contact us as below:S4A INDUSTRIAL CO., LIMITEDContact Sales: Ms Anna ZhangTel:+86 755 29450011 EXT: 608Mob/whatsapp/Viber +86 134 10500721Skype:crypton0908Email: sales1@s4a-access.com

We have noticed that several customers have recently asked the same question, why did they receive the price it is cheaper? From the pictures, they all look like identical products, but our prices are much higher than those of our peers.Therefore, to solve the customer's doubts, we deliberately ordered back samples from peers for comparison.We take door handles, an everyday item seen everywhere, for instance. I have crafted a detailed  comparison chart for your reference.In today's competitive market, many factories are focused on producing low-priced products to attract customers. While this approach might seem appealing at first glance, it's important to understand that not all products are created equal, even if they appear similar in pictures. At S4A, we prioritize quality, durability, and customer satisfaction, which is why our prices are higher than those of our peers. To clearly understand the value we offer, we have created a detailed comparison table highlighting the differences in material, size, workmanship, thickness, and other key aspects.Understanding the Difference: Quality Over QuantityMaterial Quality: The materials we use are carefully selected for their durability and performance. While many low-priced products use cheaper, less durable materials, our products are made from high-quality components that ensure longevity and reliability.Precision and Workmanship: Our manufacturing process involves meticulous attention to detail and superior craftsmanship. Each product undergoes rigorous quality control checks to meet our high standards, which may not be the case with lower-priced alternatives.Size and Specifications: Our products are designed to meet exact specifications and standards. We ensure that each product is manufactured to precise dimensions, providing consistency and reliability that you can trust.Thickness and Robustness: The thickness of the materials we use is often greater than that of our competitors. This added thickness contributes to the overall strength and durability of the product, making it more resilient to wear and tear.Innovative Design Features: We incorporate innovative design features that enhance the functionality and usability of our products. These features might not be visible in pictures but make a significant difference in performance and user experience.The Comparison TableTo give you a detailed understanding of why our prices are higher, please refer to the table below:Conclusion:While the initial cost of our products may be higher, the long-term benefits and value they provide far outweigh the savings offered by lower-priced alternatives. Investing in quality means fewer replacements, less downtime, and a better overall experience. We believe that our customers deserve the best, and we are committed to delivering products that meet and exceed their expectations.We hope this detailed comparison helps you understand the reasons behind our pricing and the value that we offer...

The Tuya App and TTlock App serve different purposes, with their main difference lying in scope of functionality and target use cases:   1. Core Purpose   Tuya App   A full smart home platform that controls multiple device types (e.g., lights, cameras, thermostats, door locks) across brands. It acts as a central hub for integrated automation (e.g., "Turn off all lights when I leave home") .   Supports voice assistants like Alexa and Google Assistant, and offers advanced features like scene customization and remote monitoring  TTlock App Specializes exclusively in smart door locks. It focuses on lock-specific features like generating temporary access codes, sharing eKeys, viewing entry logs, and remote unlocking via a gateway . Limited to lock management—no support for other smart devices (e.g., lights, cameras) .   2. Hardware Compatibility   Tuya App Works with thousands of Tuya-compatible devices from various brands, including smart locks. It allows mixing and matching devices for whole-home automation . Example: Control a Tuya-certified smart lock and a Tuya smart bulb from the same app .   TTlock App Only connects to TTlock-branded smart locks or devices explicitly designed for TTlock (e.g., certain third-party locks like RAYKUBE K8) . Requires a gateway (sold separately) for remote access .   3. User Experience   Tuya App Complex but versatile: Offers a wide range of settings for advanced users (e.g., energy monitoring, device pairing) .Ideal for tech-savvy users building a smart home ecosystem.     TTlock App Simple and focused: Streamlined interface for lock management (e.g., creating time-sensitive passwords, checking battery life) . Suits users prioritizing security (e.g., landlords managing rentals, homeowners wanting keyless access).   4. Integration with Other Services   Tuya App Integrates with third-party platforms (e.g., Amazon Alexa, Apple HomeKit) and supports custom automation rules . Example: Automatically unlock the door when your smart thermostat detects you’re home.   TTlock App Limited integration: Only connects to voice assistants (Alexa, Google Assistant) via its gateway for basic lock control . No cross-device automation (e.g., unlocking the door won’t trigger other devices).   5. Pricing Tuya App   Free to use for basic features. Some advanced services (e.g., cloud storage for cameras) may require subscriptions .   TTlock App Free for core features (e.g., Bluetooth unlocking, code management). A gateway (e.g., G2 Gateway) is needed for remote access, sold separately .   Key Takeaway   Use Tuya App if you want centralized control of a full smart home with automation and cross-device integration.   Use TTlock App if you only need to manage smart door locks (e.g., rentals, security-focused homes) . Some smart locks (like the RAYKUBE K8) even support both apps—you can choose Tuya for broader smar...

To respected Partners:As the New Year is fast approaching, we truly and sincerely appreciate your strong support for our company. S4A will officially commence its holiday on 18th,January and resume work on 6th,February , 2025.During this holiday break, you can rest assured that all our sales staff will be on standby and ready to promptly reply to customers' messages. In case you encounter any technical issues that need to be resolved, please do not hesitate to reach out to us directly through email or by phone.Thank you all, and we look forward with anticipation to a wonderful new year.

At the S4A factory, we specialize in the precision manufacturing of access control systems and automatic door opener units. With a steadfast commitment to excellence, our facility is equipped with cutting-edge technology and operated by a team of highly skilled professionals. We adhere to the highest industry standards to ensure that every product we produce meets the demands of quality, reliability, and innovation that our customers have come to expect. Our product portfolio is a testament to our expertise in the field, offering comprehensive solutions designed to enhance security and convenience. From sophisticated access control units to state-of-the-art automatic doors, S4A is dedicated to delivering products that are at the forefront of technological advancement. As industry leaders, we take pride in our ability to customize solutions to fit the specific needs of our clients, providing not only exceptional products but also unparalleled service and support. Choose S4A for your access control and automatic door requirements and experience the difference that professional-grade manufacturing can make.>