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    SECO-LARM SK-939T Series — 433.92MHz Pendant RF Transmitters Specifications

    September 08, 2026 1 min read

    Specifications for the SECO-LARM SK-939T1/T2/T3/T4 series 433.92MHz pendant RF transmitters (1-4 buttons, up to 15 channels).

    💾 Download Original PDF
    Full text manual (for reference)

    Overview

    The SECO-LARM 433.92MHz Pendant RF Transmitter series (SK-939T1-GBUQ, SK-939T2-GNUQ, SK-939T3-GNUQ, SK-939T4-GNUQ) are compact wireless key-fob-style transmitters designed to convert products to wireless control. They're compatible with all 433.92MHz SECO-LARM receivers.

    Available Models

    Model Buttons Channels Logo
    SK-939T1-GBUQ 1 1 No Logo
    SK-939T2-GNUQ 2 3 No Logo
    SK-939T3-GNUQ 3 7 No Logo
    SK-939T4-GNUQ 4 15 No Logo

    Key Features

    • Over 68 billion possible codes
    • LED transmission indicator only appears when buttons are pressed
    • Operates up to 500ft (150m)* — range varies greatly depending on installation and operating environment
    • RF anti-scan protection
    • FCC, IC, and CE certified
    • 433.92MHz frequency (315MHz also available)
    • Compatible with all 433.92MHz SECO-LARM receivers
    • Slimline design: 1 1/4" x 2 3/16" x 5/16" (31.5 x 55 x 8mm)
    • Replaceable battery: X-930-096 (CR2032)
    • Patented design

    Compatible Receivers

    • SK-910R-4Q
    • SK-910RB2-4Q
    • SK-910R4-4Q (special order item — contact SECO-LARM for details)
    • SK-910RD1 (with SK-93ERSD)
    • SK-910RD2 (with SK-93ERSD)
    • SK-910RD3 (with SK-93ERSD)
    • SK-910RD4 (with SK-93ERSD)

    OEM/ODM Private Label

    SECO-LARM can provide custom colors, labels, icons, button configurations, and cases with your own logo — all products are FCC, IC, and CE certified to bring your products to market faster. The contemporary matching design allows for easy scalability as your product line expands.

    Manufacturer Notice

    SECO-LARM reserves the right to change prices and specifications without notice as part of its policy of continual development.