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Vapes are getting smart

Legalized marijuana continues to pick up steam in the US, with 66% of Americans now in favor of decriminalization, per Gallup. Meanwhile, Silicon Valley weed-tech startups are positioning to cash in ahead of a potential flood of new customers. That includes a recent crop of app-enabled smart vaporizers that seek to leverage tech to deliver a better high.

Scroll through for a hands-on look at three of the top options currently on the market from Pax, DaVinci and Firefly.

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DaVinci IQ

First up, the DaVinci IQ. At just 3.5 inches tall, it's a stout little smart vape with an attractive metallic build, a built-in LED display and a companion Bluetooth app.

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DaVinci IQ

With the IQ, you can vape using customizable preset temperatures called Smart Paths. You'll customize those using a companion app on your phone -- it pairs wirelessly with the IQ via Bluetooth.

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DaVinci IQ

The replaceable, rechargeable 18650 (3,500 mAh) battery is good for about 90 minutes of heat, per DaVinci.

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DaVinci IQ

After loading in whatever substance you're looking to vaporize, you'll press a button to preheat the IQ, then draw vapor from it via the mouthpiece.

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Pax 3

Perhaps the most well known of these high-end, handheld vaporizers is the Pax 3, which was created by the same team that produced Juul electronic cigarettes. It's been around for a few years and is now available for $170.

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Pax 3

The LED flower on the Pax 3 serves as a multicolor indicator light. It turns purple when it's preheating, then green when it's ready for you to draw vapor from it.

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Firefly 2 Plus

The newest of these smart vapes is the Firefly 2 Plus, a third-gen model that's currently available for preorder at a price of $250.

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Firefly 2 Plus

Like previous-gen Firefly smart vapes, the 2 Plus comes with a magnetic lid, complete with a little window that lets you see what you're vaporizing as you vaporize it.

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Firefly 2 Plus

The 2 Plus has no power button. When you're ready to use it, you just hold your finger against the touch-sensitive button on either side of the device. The light flashes green for a few seconds as the device heats up to whatever temperature you've set it to in the app, then it turns solid when it's ready for you to take a hit.

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Firefly 2 Plus

When the built-in battery runs low, you recharge the 2 Plus by docking it in a charging cradle.

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Firefly 2 Plus

Here's a look at Firefly's app, which offers temperature controls, a calibration slider for incremental temperature tweaks, and the ability to select which button activates the device -- left, right, either or both at once.

The Pax and DaVinci apps are a bit more fully featured. DaVinci lets you activate a quick hit Boost Mode in addition to those custom Smart Paths, while Pax lets you activate a Stealth Mode that dims the lights and optimizes fast cool-down between draws.

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