Leaf Buddi U-Key Box V Pro Vaporizer Review

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In this post, we are reviewing the Leaf Buddi U-Key Box V Pro 510 threaded oil cartridge vaporizer. Following on from other Leaf Buddi 510 threaded vapes, we have been playing with the U-Key Box V Pro for some time.

In fact, this is the fourth Leaf Buddi vaporizer we are reviewing here at VapeFuse. If you are interested, you can also check out our reviews on the Arlo, the TH-720 Mini Box, and the Ancora Dual Mod.

The Design of the Leaf Buddi U-Key Box V Pro

U-Key Box vaporizer folded up

The U-Key Box V Pro is very discreet. It resembles a car key. Similarly to the Airistech Turboo, the oil cart flips in and out in 90 degrees. As a result, it is not immediately obvious that it is an oil vape.

There are two buttons on the V Pro. Firstly, the power button on the narrow side and the flip button on the wider side. Pressing the flip button enables you to flip the cartridge in and out.

Flip button to expose or hide the oil cartridge

The power button does the rest of the work. Firstly, pressing it 5 times in a short sequence turns the vaporizer on and off. Pressing it twice activates the pre-heat function. Finally, pressing it 3 times in a row is the way to toggle between the variable voltage settings.

Battery and Variable Voltage

The U-Key Box comes with a 350 mAh capacity battery. Also, it has 3 variable voltage settings. As mentioned above, you can toggle between these settings by pressing the power button 3 times.

The voltage settings are indicated with an LED light in the following order. Firstly, 3.6 Volts (green LED light), then 3.8 V (blue light), and finally 4.0 V (red light).

Airis Janus 510 Thread and Pod Compatible Oil Vaporizer

What’s in the Box?

The kit includes the U-Key Box V Pro vaporizer and a micro USB charging cable. That’s it. The oil cartridges screw directly into the vaporizer, so no magnetic connectors needed.

What's in the Box?

How to Use the Leaf Buddi U-Key Box V Pro

First of all, we recommend putting your new vaporizer on the charger for about 2 hours before the first use. After that, simply screw your cartridge into the 510 thread.

Next, turn on the battery by pressing the power button 5 times. Then, set your desired voltage by pressing the power button 3 times. Ticker oils, such as THC oils generally require higher voltage settings.

After that, just press the power button and inhale and enjoy your vapor.


The Leaf Buddi U-Key Box V Pro is a discreet 510 threaded oil cartridge vaporizer. It resembles a car key and as a result, it is quite easy to keep it out of unwanted attention.

In fact, the main feature of this battery is being discreet. Apart from that, it is a simple oil cart battery that works with most size commonly available 510 threaded oil carts.

If you have any questions or any experience with the U-Key Box to share, please feel free to comment below.



I have been vaporizing herbs for many years and working for VapeFuse in Australia and Europe. I try every vaporizer and fortunate enough to have this as part of my job. I feel like I am living the dream. I love to hear from other vapers, so always feel free to comment on my posts. Keep on vaping.

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