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G Pen Pro

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G Pen Pro 

Now Grenco Science has hit us with their latest offering, the new G Pen Pro vaporizer, which takes all the features of the original that we loved so much and improves on each and every one of them to bring smokers a portable dried product vape that will blow the competition away. Not only is it a pocket powerhouse that will do a great job of vaporizing your dried productss, but it is also so subtle that most people won't even notice you using it, and on top of all that the awesome price means it doesn't break the bank.

Grenco has released the G Pen Pro, based on the older G Pro model but completely refurbished and improved. Each of its components has been redesigned to ensure the best performing portable dry herb vaporizer available today! The main improvement is the oven; now the device comes with a ceramic chamber, which raises the quality of the vapor and enhances the flavor of every session.

Technical Information

Material Dry Herbs
Oven capacity 0.25 grams
Temperature Levels 190ºC to 220ºC (3 configured levels)
Heat Up Time 20 seconds
Heating System Convection
Oven Material Ceramic
Air Flow Material Stainless steel
Mouthpiece Material Silicone and plastic
Outside Material Stainless steel
Battery Capacity 40 minutes approx
Charging Time 3 hours
Charger Type Micro USB
Smartphone app N/a
Functions LED lights that display temperature settings
Approximate Dimensions 11,6 x 2,5x 2,4 cm. 
Weight 80 Grams
Warranty  1-Year warranty on electronic components 

Design and Components

The new G Pen Pro features a body made of aluminum finished with a soft-touch matte coating which not only means that it feels great in the hand but it can also stand up to the knocks and bumps associated with daily use. To give users the best possible vaping experience the G Pen Pro has a fully ceramic oven for your dried products and is also fitted with a ceramic heating element to keep your flavor clean and pure, just the way you want it.

The mouthpiece is made of plastic and has a soft silicone cover which makes it super comfortable on your lips when taking a draw. They have also kept the oven a good size and actually made it slightly larger so that you can pack plenty of dried products in there. It measures 8.6 mm across and just over 16mm deep so you can easily fit around a  quarter of a gram of material in there for each session.

G Pen Pro Temperature Settings

To give you the best vaping experience there are three temperature setting to choose from. For easy vaping, the device has an LED screen that can show you which heat setting you are currently on:

  • 190ºC - blue
  • 205ºC - green
  • 220ºC - red

The lowest is 375 degrees fahrenheit (blue) the middle is 400 degrees fahrenheit (green) and the highest is 428 degrees fahrenheit (red). These different settings mean you can tailor your flavor and vapor levels to exactly how you like it. The clever technology inside the GPen Pro also allows it to heat up from cold in as little as 20 seconds so you won't be left waiting for you hit while it gets ready.

G Pen Pro Battery

The lithium-ion battery has a capacity of 1300mAh so you won't find you are left with a dead battery after just one or two sessions and charging is taken care of via a micro USB charging lead which means you can pretty much plug in anywhere for a boost these days. Once turned on, the oven will immediately begin to heat up and then once there it will automatically power off after 4 minutes to conserve battery life.

Included with the Vaporizer

1 G Pen Pro
1 USB charging cable
1 handling tool
1 cleaning tool

Pros and Cons


  • One of the least expensive portable convection vaporizer on the market.
  • LED light system makes the G Pro easy to use and accessible to anyone.
  • Quick heat up time - for when you need a vape and you need it now.
  • Multiple temperature settings allow for a more customized vaping experience.


  • The stainless steel heating chamber may not be what every vaper is looking for, with some preferring ceramic.
  • There is a short vape path - From the heating chamber to the mouthpiece.

How to use the G Pro vaporizer

With single, smart-button activation and removable parts, the G Pro vaporizer is easy to use even if you’re a beginner. Here’s a quick rundown of exactly how it works:

1. How to operate the G Pen vaporizer

Remove the mouthpiece and load your favorite herb into the ceramic chamber. Replace the mouthpiece once it’s fully loaded, then press the button five times to turn your vape on.

From there, select a heat setting, wait for your unit to heat up, and draw from the mouthpiece once it’s ready. 

2. How to get the best vapor quality

To consistently get great vapor from the GPen Pro, it’s important you’re choosing the right heat setting, packing the chamber correctly, and keeping your unit clean. 

The right temperature

The green zone (400°F) is a nice middle ground, as it provides what many vapers would consider the ideal balance of flavor and vapor.

If you’re a certified flavor chaser, however, you'll want to try out the blue zone (375°F). If you’re into thicker vapor clouds, you’ll want to try out the red zone (428°F).

The perfect pack

Finely grind your herbs, then pack the chamber densely. This should be the perfect recipe for getting satisfying vapor from your G Pro vaporizer.

Keep it clean

For satisfying vapor with a great taste, it’s important you’re taking care of your device with regular cleaning sessions and proper maintenance. 

3. How to clean the G Pen vaporizer

Here’s what you’ll need to do to clean your G Pen Pro vape:

  • Empty the chamber of any herb
  • Use the cleaning brush to remove excess debris from the chamber
  • Use the cleaning brush to wipe off the screen and mouthpiece connections
  • Remove the silicone cover from the mouthpiece
  • Soak everything (besides the silicone cover) in isopropyl alcohol for 2-5 minutes
  • Let all parts dry completely before using your GPen Pro again

Note: To ensure great flavor after cleaning, it’s best practice to run a burn-off cycle. To do so, just heat your vape to the maximum temperature setting and let it run empty for the length of a few sessions.

Customer Reviews
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Filter Reviews:
United States United States
I recommend this product

Didn't know what to expect

This has been a very interesting experience, as I didn't know a dry herb vaporizer existed. I'm new to all this, and not a spring chicken, if ya know what I mean... This has an easy draw, heats fast, does the trick. I do wish there were more videos that show how to load it properly, as in amounts, as I don't want to overload the unit (if that's even possible?) and would like to get the most from usage, not just burn through excess product if I should shut it off between hits, or exactly how to use it, not just how to turn it on and make it work (if that makes any sense to other new users). Love it otherwise!

Theresa B.
United States United States
I recommend this product

New to the vape

This was easy to use and does as expected. It takes getting use to, because its a more mild drag than smoking a doobie.

G Pen Pro

G Pen Pro