• Aug 01, 2025 Access Control Turnstile Motors: Brushed vs. Brushless vs. Servo Motors
    In access control turnstile systems, the choice of motor type significantly impacts performance, lifespan, and maintenance costs. Below is a detailed comparison of three motor types: Brushed DC Motor (BDC), Brushless DC Motor (BLDC), and Servo Motor....
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  • May 29, 2025 S4A TUYA Smart Home Solutions
    The Tuya Smart App (also known as the Smart Life App) is a popular IoT (Internet of Things) platform developed by Tuya Smart, a global leader in smart home and business automation solutions. The app allows users to control and manage a...
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  • May 29, 2025 S4A TTLOCK Smart Device
    The TTLOCK App is a smart lock management application developed by TTLOCK, a company specializing in IoT and smart access solutions. The app allows users to control and manage TTLOCK-branded smart locks and other compatible smart devices re...
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  • Jun 15, 2024 Pedestrian Access Gate
    Pedestrian Access Gate is a controlled entryway designed for the use of pedestrians, providing a secure and manageable point of access. These gates are employed in various settings such as commercial buildings, residential complexes, schools, transportati...
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  • Nov 03, 2023 The 19th China Public Security Expo (CPSE) - S4A Booth Number 3D43
    CPSE Security Fair, founded in 1989 in Shenzhen Special Zone, 
    34 years of growth, 18 security exhibitions, is the world's largest security exhibition, the most authoritative and influential security exhibition in Asia. IN-PERSON EVENT: Shenz...
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  • Feb 07, 2023 How do we know S4A Automatic Swing Door Openers is PULL or PUSH door?
    We noticed that when many customers choose automatic door openers,
    they do not know whether their door is pushed or pulled. The picture below can help you understand.
    If you want to buy an automatic door opener stopper, as below:

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  • Nov 21, 2022 S4A Production Line For Vehicle Loop Detector
    S4A Vehicle Loop Detector support 220V / 110V / DC12V / DC24V.
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  • Nov 21, 2022 S4A Metal Standalone Access Controller Production Line
    S4A Manufacturer Standalone Access Controller,
    this is our production line for the S series Standalone access controller,
    from the first step to the last repair step and all access control units within 2-year quality guarantee,
    OEM & ODM a...
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