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Grenco Science G Pen Roam

VENDOR: Grenco Science

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Who Should Buy The G Pen Roam?

The G Pen Roam is a concentrate vaporizer that offers some fairly revolutionary functions and features. This product is for you if you are big into concentrates and looking for a product that is portable but still hits hard. 

Love cool hits? Perfect. The G Pen Roam comes with an integrated bubbler that sits internally. This is for wax enthusiasts who love innovation. The G Pen Roam is packed full of new ideas. We think it is always important for manufacturers to experiment, and this product certainly pushes the boat out on that forum!

Why You’ll Love the G Pen Roam?

You’re going to love the G Pen Roam because it is the perfect cross between a wax pen and an e-rig. It is small enough to take around with you to parties and gatherings. On the flip side, it is large enough that you can share it around and really get flavorful hits out of your concentrates. 

On top of this, the G Pen Roam has a trick up its sleeve. That is the mini bubbler that it contains under the hood. We think this is an excellent little innovation that makes a huge difference to the smoothness of your hits.

Cookies x G Pen Roam

The Cookies x G Pen Roam portable dab rig is a collaboration between two giants in their respective fields: Cookies Enterprises and Grenco Science. 

For those familiar with Grenco Science, they are renowned for their outstanding quality vaporizers and portable e-rigs. The G Pen Roam is arguably the most innovative of their extensive catalog. The Cookies model is identical to the G Pen Roam we all know and love in function. Where it differs is in its beautifully aesthetic exterior that boasts the famous Cookies blue with the logo also situated on the front of the unit.

How To Use the G Pen Roam?

We will talk you through every step you need to take prior to using your G Pen Roam for the first time.

1. Charge the Battery

We always recommend fully charging the battery of your new product before first use. This will help you to increase the longevity of your battery life to its full potential. Plug-in your Micro USB charger to your device and the other end into your wall socket. Charge for 1-2 hours.

2. Fill the Water Tube

Filling the water tube of your G Pen Roam is easy. First things first, remove the battery from the unit as well as the heating chamber. Do this by pulling up and away from the mouthpiece.

Gently pull upwards on the mouthpiece to remove the enclosed water tube. Fill the water tube up to the black fill line at the bottom of the tube. Be sure not to overfill with water. Reattach the mouthpiece and the battery. 

How To Operate The G Pen Roam

To load concentrates into the G Pen Roam, open the lid to expose the filling chamber that contains the quartz heating element underneath. Place your concentrates (we recommend using a small amount, the size of a grain of rice) inside the filling chamber onto the center of the enclosed quartz dish using the G Pen Tool. Close the lid. Turn the device on and select your desired temperature. 

To turn the device on, click the power button five times. You can change the exact temperature by pressing the up and down buttons. Press the power button twice to activate heating. You can change from auto to manual by holding down the power button. This will heat the coil so long as you have the button held down. The temperature settings can be adjusted in increments of 25* F by pressing the up and down buttons.

Once the G Pen Roam is powered on and the desired temperature is selected, click the main power button two times to activate heating. The Roam will vibrate, and its display will show wavy lines to indicate heating has begun. Once the unit reaches temperature, it will vibrate again and will display a thumbs up. Heating can be canceled at any time during the process with two more clicks of the power button.

How To Clean It

First of all, separate the quartz tank, tank cover, and the two detachable air path channels. Soak all the components (excluding the silicone air path channel) in Isopropyl alcohol for 30-60 minutes and then wipe all the remaining residue off using cotton swabsbuds, pipe cleaners, or q tips. You can also use these to gently swab the silicone air path channel liner and battery. Be sure to wipe all the parts down and allow them to dry completely.

It is also important to address all the common areas for clogging. These can be found in the stainless steel air path of the battery as well as the air path opening at the bottom of the Quartz tank. You can minimize clogging by limiting your loads to smaller dab sizes.

Fully assemble parts and engage device at full activation on MAX temperature level to burn off any residual ISO on remaining parts.

Top G Pen Roam Features 

g pen roam

1. The Revolutionary Hydro-Tube

We all know that just a small amount of water filtration can go a long way when it comes to vapor smoothness. This is why we were stoked to see the mini bubbler featured in the G Pen Roam. It makes a huge difference to the vapor comfort and we think this may be a feature that more manufacturers start to offer over time.

2. Impeccable Design

The G Pen Roam has a stylish aluminum alloy casing with a silicone cover. This gives it a classy and expensive feel without compromising on grip-ability and functionality. Cleaning a concentrate vaporizer is generally no easy feat as the concentrate can get everywhere. Fortunately, the G Pen Roam can be easily disassembled for cleaning even the most \hard-to-reach areas. We also love the position of the mouthpiece. 

The included hemp travel case does a great job of storing all the components. As a result, the casing is your all-in-one vaping station. Last but not least, the removable/replaceable heating chamber and battery. In the long run, these details allow you to maintain your device easily and adds convenience.

3. Enough Power for a Party

The water-filtered concentrate vaporizer has a 1300mAh lithium-ion battery that can last about 20 sessions. Thanks to the powerful battery, it heats up in just a few seconds. The Roam has a 30 seconds heat duration before it cools down to preserve your battery life and vaping material. Of course, you can extend or reduce the heat duration as you please. Using the provided micro-USB cable, G Pen Roam charges about 90 minutes and it can be used while charging. Meanwhile, you can also purchase an extra battery to swap out whenever you want.

4. Fantastic Temperature Range

The G Pen Roam has fairly precise temperature controls. It can handle any temperature between 400 and 800 degrees with a 25°F interval. Additionally, you can set the vape to Max mode at the end of your session. This will take your G Pen Roam to the absolute maximum. This is a great way to clean out all the residue from your chamber and also helps you with performing burnoffs to keep your device tasting delicious. 

Is the G Pen Roam worth It? 

i g pen roam worth it

At under $250, the G Pen Roam is a real steal. This is a premium concentrate vaporizer with premium features and novel attributes that really make it stand out from the crowd. The G Pen Roam dissects the market at a very interesting angle. It is not a conventional dab pen, nor is it an e-rig. It is seemingly a hybrid of the two. It sits comfortably in this section of the concentrates vaporizer market with very few direct competitors. This means that G Pen could have afforded to charge more for the G Pen Roam but they opted for a more affordable price tag. So in short, yes. The G Pen Roam is totally worth it.

Compare with similar products

G Pen Roam vs Puffco Peak

In our honest opinion, the G Pen Roam creates its own space in the middle ground in between was pens and e-rigs. If you are looking for the biggest hits with the authentic dabbing experience, go for a Puffco Peak. Likewise, if you are in need of a device that is truly portable, you may want a smaller wax pen. The G Pen Roam has a great balance between portability and power.

G Pen Roam vs Mighty

The G Pen Roam and the Mighty are very different in that one is tailored for use with dry herb and the other is only for concentrate. The Mighty can be used with concentrate however it is not a concentrate vaporizer. If concentrates are your thing, go for the G Pen Roam!

What’s included:

  • 1x G Pen Roam Battery Battery
  • 1x G Pen Roam Quartz Tank
  • 1x G Pen Roam Glass Tube
  • 1x G Pen Roam Mouthpiece
  • 1x G Pen Roam Hemp Travel Case
  • 1x G Pen Tool
  • 1x Micro USB Charging Cable

    Technical Specifications:




    Full LED Display

    Temperature range

    400-800 Degrees Fahrenheit

    Charging time

    1-2 hours

    Battery length

    8 Sessions

    Battery Capacity


    Chamber Material


    Heating system



    1 Year

    G Pen Roam FAQ

    How to replace the G Pen Roam atomizer?

    It is easy to replace the atomizer of the G Pen Roam. First, flip the tank lid up. Make sure you allow your quartz tank to cool completely before handling it. Gently pull the quartz tank out from the base. You can then slide the quartz tank out of the silicone cover and insert the new Roam atomizer. 

    How do I know when to recharge the battery?

    The LED Display will show an image of a flashing empty battery. It also won’t heat up if it is running low on battery.

    Grenco Science G Pen Roam

    Grenco Science G Pen Roam

    Dr. Greenthumb
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