“Completely invisible to all radar detector detectors while maintaining a high, blistering sensitivity to all radar bands.”
- Speed Measurement Laboratories

New Exclusive TotalShield™ Technology
Our new TotalShield™ technology makes the STi completely invisible against any type of radar detector detector. Not only will it keep you unseen by the current VG2, Stalker and Spectre, it will be completely undetectable by future threats as well.
Faster Response
The STi’s lightning fast microprocessor can detect and process a signal in less than one second! This "attack time" is crucial against laser and instant-on radar.
Digital Signal Processing (DSP)
Beltronics' patented AutoScan™ feature continuously analyzes all incoming signals and automatically rejects unwanted false alarms. This gives you, the driver, the perfect balance of sensitivity and selectivity!
Easy-to-Use Options and Controls
The STi is simple to own and operate. You can customize the STi to meet your specific driving style. The easy-to-use selectable options make it simple to change.
New Level of Laser Protection
Our Total Tracking Laser™ circuitry continually searches for laser guns. Maximum range, including superior off-axis protection, is standard.
Clear Digital Voice Alerts
Extra loud tones provide audio you can hear even in noisy environments. Or, choose our easy to understand digital voice alerts, that keep you informed without taking your eyes off the road.
Programmable Processor
Using the latest technology in “flash” microprocessors, the STi’s software is upgradeable to address new threats in speed measurement devices.
Mute and AutoMute
The STi’s AutoMute feature automatically reduces the volume level during an alert. Or, simply press the large top-mounted Mute button during an alert to instantly quiet the audio.
Programmable Brightness Control
Including Automatic and Dark modes, the STi keeps the display visible in all lighting conditions. Automatic Mode senses the amount of light and adjusts accordingly to allow easy visibility.
Comes Fully Equipped
The STi comes complete with a comprehensive owner’s manual, quick-release windshield mount, high-performance coiled SmartPlug cord, Direct wire SmartPlug cord, amplified external speaker, quick reference card, and lockable hard travel case.