Premium AL7000 | Professional-Grade Breathalyzer | Accuracy with Innovative Replaceable Sensors | Replace Sensors, Precisioin Sustained | DOT & US Coast Guard Certified | Basic Package

Recalibrating these annually is essential if you want to be able to rely on the numbers it gives you. The one I had before had to be sent back to the manufacturer to replace the sensor. This one makes it super easy to insert a new sensor once a year. But beware: the replacement sensors have a limited shelf life, and some sellers are offering sensors with a lot less than 12 months left before they expire. And of course they don't give you a prorated discount for the months you aren't getting.

Works well and is consistently accurate and simple to use. Have used several others in the past which while no cheaper were essentially inaccurate toys (eg BluFire etc). I’m in the medical field and bought this for scientific interest; it is consistently repeatable and accurate. It is useful to correlate one’s perception of inebriation versus reality. Recommend.

This breathalyzer is phenomenal. I got it because my work (the world's finest Navy) started randomly breathalyzing us which sucks but it is always a little better to know in the morning if you are going to pop. This is actually the same model the Navy uses. The biggest things I have noticed is that you need to wait at least 15 minutes before your last drink to get an accurate read. I think the calibration and reads are on point. They will sometimes seem a little high but I am not convinced another breathalyzer would give a different reading - I think it is just the nature of the product. Overall, I got this for a great price and have been completely satisfied.

Do not trust this breathalizer!!I do NOT get consistent results using it. I will test myself or a friend 3 times in a row, or more, and get a wildly different reading each time! This is after installing a new sensor module.Each time, I wait atleast 30 minutes after my last drink.This can get you in trouble, or get someone killed, if relied upon. Which many of my friends have in the past because it’s supposedly trustworthy. I no longer allow friends to use my breathalizer because I don’t want to be responsible if they get hurt because they got a false reading.This company needs better quality control.

I've found this product extremely helpful. For those of us who need to watch it closely, in the morning (on the way to work for instance , or anywhere) is critical. This little guy has been immeasurable in it's information, and I have learned a lot from it. It's not 'perfectly' accurate I'm sure, but neither are the field breathalyzers the police employ on the street. but it sure takes the guessing out of it. And yes, it can give variant readings one test after another, but it's a handheld device and meant to be a guide, not a piece of evidence.A good thing about this model- you don't need to send it in for 're-calibraton' which can take nearly 2 weeks. you simply order new sensors ahead of time, replace them yourself (super easy), with no downtime and less cost to you.I can only imagine the some of the folks posting awful reviews up here with gibberish readings- they likely had a bad/old sensor. if they paid super discount prices, that may have been why.Either way- I absolutely recommend this product if you like to drink, and operate machines, especially cars, trucks and boats. don't trust how you feel, trust the thing in your pouch that doesn't care.

Please read!! This device is extremely accurate. However, you can't take a shot then expect it to function properly, actually you might ruin its accuracy. Wait 10 minutes or so before using it and it'll be worth it's weight in gold. I can blow a .068, hand it to my girl and it'll blow .000, then blow again and get a .068. It works very well and I'm probably going to buy another so I can keep one in the house and not have to go to the car to see if I'm alright to drive.

My wife and I have owned this for a few weeks and have used it a couple dozen times. It seems very solidly made and the readings seem reasonable, given our alcohol intake, and reproducible (within about a 5% range). A suggestion that seems sensible, although not in the instructions and I can't prove its importance, is to take in a moderately deep breath, hold it for 5-10 seconds, breath slowly out and then start to breath into the breathalyzer without stopping your expiration. This would seem to best assure a reproducible measurement of an equilibrated air sample from deep in your lungs and not from the trachea, which could represent fresh air that you have just inspired.

Perfect for what it is.