Klario™ Pro — Personal Fuel-Cell Breathalyzer

I recommend it 100%. After a big family dinner, I test myself before getting back on the road and I know exactly where I stand. Easy, fast, and it puts everyone at home at ease — here it is in the photo.

Perfect for my peace of mind. The result shows up in just a few seconds and the screen is really easy to read. I keep it in my bag all the time — it's genuinely compact.

Way more reliable than the disposable breathalyzers I used to buy. USB-C rechargeable, accurate, and it fits right in the glovebox. Exactly what I was looking for.

I got it for my son, who just got his license, and ended up grabbing one for myself too. Getting a clear number before making a decision has become second nature. Sturdy and simple to use.

As a young driver, I use it every single time. The limit is unforgiving when you're just starting out, so I'd rather check my BAC before driving or handing the keys to someone else.

The fuel-cell sensor really makes a difference — the readings are consistent from one time to the next. I mostly use it to see where I'm at before deciding how I'm getting home.

No more single-use chemical breathalyzers that you have to keep rebuying. With this one you just charge it over USB-C like a phone and you're good to go. Over time it's a lot cheaper and greener.

Tried and approved after a dinner out at a restaurant. The reading made me realize it was better to wait a little longer before heading home. Exactly what you want this kind of device to do.

After a family dinner with plenty of wine, I test myself and I'll happily wait until the next morning if I have to. It helps me make an informed decision and never take a chance.

Great after a night that got a little out of hand. We test again the next morning too, because people forget how long alcohol takes to clear your system. A real eye-opener.

Bought it for my kid, who just got their license. The limit is stricter for new drivers, so being able to check on their own gives me huge peace of mind.

It lives in the glovebox permanently. That way, before getting behind the wheel after a family meal, I can check where I stand. Saves you from any nasty surprises.

I tell everyone close to me to keep one in the car. It's not a green light to drive — it's just one more piece of information to help you make a smart decision.

After a family dinner with a few drinks, it's reassuring to know my BAC. When it's too high, I just let someone else take the wheel. Simple as that.

I mostly use it as a precaution the morning after a night out. People always underestimate how much is still in their system when they wake up, and this way you at least have a reliable number before you go anywhere.

I use it before every drive when I've had drinks the night before. Twice my BAC was still too high in the morning, so I waited or took the train instead. It really opens your eyes.

Four stars because you have to remember to wait about fifteen minutes after your last drink for an accurate reading, but once that becomes a habit it's perfect.

Nothing like the disposable balloon-style tests I used before. The reading is precise and gives you an actual number, so I'm no longer guessing between two iffy colors. Truly a different level.

Good product, reliable. I'm taking off one star only because you need to plan for a yearly recalibration to keep it accurate, but that's normal for this type of device.

I picked it up mostly out of curiosity and I end up using it way more than I expected. Just knowing your BAC changes how you approach the end of a night out.

Result in five seconds flat — it's honestly impressive. The fuel-cell sensor gives an accurate reading that lets me know where I'm at before getting behind the wheel.

Perfect pocket size — it fits in a jacket without being bulky. I take it everywhere, and the removable mouthpiece swaps out in a snap, which is nice and hygienic when you lend it out.

The USB-C charging is super convenient — I plug it into the same cable as my phone. No more buying disposable mouthpieces every couple of weeks.

Perfect for holiday meals. Between the cocktails before dinner and the drinks after, you quickly lose track of where you're at, so having a reliable device on hand is priceless.

Result in five seconds — honestly impressive. The fuel-cell sensor gives a steady number and I feel a lot more at ease before getting behind the wheel.

The fuel-cell sensor gives steady readings that I find reassuring. It doesn't give anyone the go-ahead to drive, but it really does help you make the right call.

The sensor warms up quickly and the result comes through in a few seconds. No endless waiting like on some of the cheaper models out there.

What I like is how clear the numerical reading is. You know exactly where you stand and can make a responsible decision with the facts in front of you.

The one small downside is that you'll need to recalibrate it after a while to keep it accurate. Nothing dramatic, but it's good to know from the start.

A purchase I don't regret one bit. It reassures the whole household and gets everyone into the right habit: check first before deciding whether or not to drive.

The accuracy surprised me — I compared it once against a police test and the numbers were very close. A device I genuinely trust.