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id="cnetReview" section="rvwBody" data-component="indepthReview"> Escort's Passport Max brings few new tricks to the radar detector's bag of tricks. It's got GPS connectivity, which it uses in some innovative ways. It uses new signal-processing tech to tune out the noise that triggers false alerts. It's even got a new suction cup.

Design
The Passport Max attaches to your car's windshield with a new Sticky Cup suction mount, similar to that of the Bracketron Mi-T Grip. While it looks like a standard lever-activated suction cup, the Sticky Cup uses a tacky, indeed, sticky semiadhesive material for its cup. With this change, the Passport sacrifices a bit of liberty for security, as the new suction cup is less forgiving during positioning (as it sticks to rather than slides on glass and has only one hinged point of articulation) and is more difficult to remove, but holds to the windshield glass with great strength.

Escort refers to the Passport Max as "compact" but at 1.3 by 3.2 by 5.3 inches, it feels pretty big to me. Imagine about three Nexus 4s stacked sandwich-style, and you'll have an idea of its size. Still, size doesn't really matter here, as the Max isn't really the kind of thing that you'd carry around all day, though it does ship with a nice soft carrying case for it and its accessories.

View full gallery The Passport's OLED screen displays information about your speed, upcoming hazards, and current radar detection. Antuan Goodwin/CNET Crammed into the chassis and peeking from behind tinted plastic on the front of the device, you'll find the sensors for the Passport Max's radar and laser detection. Atop the device, you'll also find a second, rear-facing laser detector periscoping out of the chassis.

The top is also where you'll find buttons for mute, power, marking a threat, volume, sensitivity, and brightness, many of which pull double duty.

The back of the device, which points at you, the driver, is home to a thin, full-color OLED display rather than the standard LED matrix. Here is where the Passport will share information about its operation with the driver. The interface features adjustable backlight level and color controls.

Supplying power to the Max is the SmartCord, which integrates the 12-volt power connector, lights indicating power on and alert detected, and a mute button. The mute button performs a few hidden functions that we'll return to momentarily, but primarily it's there so you won't have to stretch all of the way to the windshield to shut off an alert while driving, which can be difficult, even impossible, in some cars. The SmartCord connects to the Passport Max with what looks like an RJ-11 telephone connection, allowing it a bit of bidirectional communication.

Next to the SmartCord connection on the passenger's side of the device, you'll also find a Mini-USB connection for firmware and database updates (though a USB cable was not included in the box), and a headphone jack to output audio prompts (both beeps and spoken words). Perhaps you'd like to connect the Max to your car stereo's auxiliary input? This is where you'd plug in.

View full gallery The Max boasts a USB port for updates, a connection point for the SmartCord, and an audio output. Antuan Goodwin//CNET GPS-enabled, so it knows your speed
On the top of the Passport Max, just ahead of the Mute button, are engraved the letters "GPS." No, the radar detector won't navigate you home, but its connection to the global positioning system affords it a few advantages over your average detector.

Firstly, it knows how fast you're going. You can set, in a menu, Kiev Escorts an OSP Over Speed Alert, which is a maximum speed that you don't want to exceed. Drive more than a few miles per hour faster and the Max will beep and speak the words, "Reduce speed." This is a nice, proactive way to avoid tickets by simply not letting your speed get away from you.

With its Variable Speed Sensitivity, the Max is also able to tailor its sensitivity to the sort of driving the vehicle is actually doing. At highway speeds, it can optimize for long-range sensitivity, while at slower speeds, the sensitivity can be adjusted to tune out more false positives, since you're not at risk of getting a speeding ticket. I noticed that even the sound of the alerts are different: there's only a short double-chirp for alerts at speeds below than 20 mph.

View full gallery The GPS-enabled Max knows where you are and how fast you're going. Antuan Goodwin/CNET Also, the Max knows where you are. Loaded on the device is Escort's Defender database of red-light and speed cameras. As you approach one of these hazards, the detector will beep at you and say, "Speed camera ahead." The Defender database can be updated weekly by connecting the Max to your Web-connected computer.

The system is also able to "AutoLearn" where false positives (like door openers or those fixed-position speed signs) are and can automatically record their position and learn to ignore them over time.

On-the-road testing
The Passport Max debuts a new Digital Signal Processing technology -- which is supposedly borrowed from military tech, but sounds a lot like audio DSP technology reapplied. By processing the RF signals detected by the Max's sensors, the detector is able to essentially tune out the noise, separating "real radar threats" from RF interference and false positives for improved accuracy.

The Max is also equipped with Traffic Sensor Rejection (TSR) software, which can automatically ignore radar pings from wireless traffic sensors used on certain highways.

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