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  • STI-34xxx Series — Wireless Transmitters and Sensors Overview

    September 08, 2026 2 min read

    Overview of the STI wireless transmitter and sensor lineup — driveway monitors, mail alerts, garage sentry, doorbell buttons, and motion detectors.

    Full text manual (for reference)

    The STI Wireless Transmitters and Sensors line (STI-34xxx series) lets you wirelessly monitor doors, gates, mailboxes, driveways, and other points around a home or building, alerting through a companion STI receiver.

    Overview

    STI transmitters and sensors detect and report events like an open/closed garage door, mail delivery, a car entering the driveway, an opened exit door, a removed fire extinguisher, a fence gate, or a medicine cabinet being accessed. A paired STI receiver — monitoring up to 4 or 8 devices from a single, convenient location — chimes or speaks a custom voice message when a monitored transmitter is triggered.

    How It Works

    Wireless Driveway Monitor — Solar or Battery Powered (STI-34101 / STI-34151)

    Detects a vehicle entering or leaving a driveway. Movement of any large metallic (iron or steel) object near the sensor transmits a signal to the receiver.

    Wireless Mail Alert® (STI-34201)

    Alerts when the mailbox door opens, eliminating repeat trips to check an empty mailbox.

    Wireless Garage Sentry® Alert (STI-34301)

    Alerts when the garage door opens, and reports an open or closed status.

    Wireless Universal Alert / Wireless Door Entry Alert® (STI-34401 / STI-34501)

    Signals when a monitored site is tripped — usable on a medicine cabinet, fence gate, window, shed, etc.

    Wireless Doorbell Button Alert (STI-34601)

    Water/weather-resistant button that sends a signal when pressed. Up to 500 ft. line-of-sight range.

    Wireless Motion Detector Alert — Indoor or Outdoor (STI-34701 / STI-34752)

    Sends a signal when motion is detected. To conserve battery, the sensor will not re-trigger for three minutes after tripping.

    Key Features

    • Wirelessly monitor up to 4 or 8 different devices from one location.
    • Installation options: on-board reed switch, remote terminal set, or tilt switch (excludes driveway monitors).
    • Includes a magnetic contact with 18" lead for irregular installations.
    • Requires an STI 4-Channel Receiver (STI-34104), 4-Channel Voice Receiver (STI-V34104), or 8-Channel Receiver (STI-34108) — the receiver chimes/flashes when a monitored site is tripped.
    • Up to 1,000 ft. line-of-sight range between transmitter and receiver (STI-34601 offers 500 ft.).
    • Battery included.
    • FCC & IC compliant.

    Models Available

    Transmitters

    Model Description
    STI-34101 Wireless Driveway Monitor (solar powered)
    STI-34151 Wireless Driveway Monitor (battery powered)
    STI-34201 Wireless Mail Alert®
    STI-34301 Wireless Garage Sentry® Alert
    STI-34401 Wireless Universal Alert
    STI-34501 Wireless Door Entry Alert®
    STI-34601 Wireless Doorbell Button Alert
    STI-34701 Wireless Indoor Motion Detector Alert
    STI-34752 Wireless Outdoor Motion Detector Alert

    Accessories

    STI-V34104 4-Channel Voice Receiver
    STI-34108 8-Channel Receiver
    STI-34103 Power Supply
    STI-30105 Extended Antenna
    STI-34106 Key Fob for Wireless Alert Series
    STI-34109 Repeater

    4-Channel Voice Receiver Kits

    STI-V34100, STI-V34150, STI-V34200, STI-V34300, STI-V34400, STI-V34500, STI-V34600, STI-V34700, STI-V34760 — bundles each transmitter type with a 4-channel voice receiver.

    Single Channel Slave Receiver Kits

    STI-34119, STI-34159, STI-34209, STI-34309, STI-34409, STI-34609, STI-34709, STI-34759 — bundles each transmitter type with a single-channel slave receiver.

    Related Wireless Products

    STI-6200WIR (Wireless Fire Extinguisher Theft Stopper®), STI-6400WIR (Wireless Exit Stopper®), STI-6517B (Wireless Stopper® Station Shield with sound and transmitter).

    Contact

    Safety Technology International, Inc. — 2306 Airport Road, Waterford, Michigan 48327, USA. Toll-free: 1-800-888-4784 (4STI). www.sti-usa.com