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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.
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.
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.
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.
Alerts when the mailbox door opens, eliminating repeat trips to check an empty mailbox.
Alerts when the garage door opens, and reports an open or closed status.
Signals when a monitored site is tripped — usable on a medicine cabinet, fence gate, window, shed, etc.
Water/weather-resistant button that sends a signal when pressed. Up to 500 ft. line-of-sight range.
Sends a signal when motion is detected. To conserve battery, the sensor will not re-trigger for three minutes after tripping.
| 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 |
| 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 |
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.
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.
STI-6200WIR (Wireless Fire Extinguisher Theft Stopper®), STI-6400WIR (Wireless Exit Stopper®), STI-6517B (Wireless Stopper® Station Shield with sound and transmitter).
Safety Technology International, Inc. — 2306 Airport Road, Waterford, Michigan 48327, USA. Toll-free: 1-800-888-4784 (4STI). www.sti-usa.com
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