Discover the ultimate safety companion with our high-precision breathalyzer! Equipped with a sensitive semiconductor sensor, it delivers quick, reliable readings to ensure you're safe to drive. Featuring energy-efficient operation on 2 AAA batteries and an auto-off function, it can perform over 200 tests per set. Its compact, lightweight keychain design means you can carry it effortlessly wherever you go, ensuring safety is always within reach. The large, orange backlit LCD screen offers clear readability even in the darkest conditions, perfect for nighttime use. Plus, enjoy complete peace of mind with a 30-day money-back guarantee and a lifetime warranty. Stay safe, confident, and in control—every time you test with our portable breathalyzer!
Buying this product you will collect 20 points with our loyalty program. Your can convert 20 points in your account into a voucher for a future purchase.
GREENWON Battery Powered Breathalyzer Keychain Digital Alcohol Tester Detector Breath Analyzer Audible Alert Portable with LCD Display and Replacement Mouthpiece Personal Use G/Black
Experience reliable and portable alcohol testing with the GREENWON Battery Powered Breathalyzer. Featuring a semiconductor sensor, this compact device offers fast warm-up within 10 seconds and results within 5 seconds. The digital display and audible alerts provide clear readings in a convenient keychain size with a red backlight for easy visibility. Powered by 2 AAA batteries (not included), it includes 6 replaceable mouthpieces ensuring hygienic personal use.
The official GREENWON logo highlights the trusted brand behind this portable breathalyzer. Crafted to meet personal safety needs, it assures quality and dependability in each use.
During the warm-up phase, the display signals "Blow" prompting the user to blow steadily into the nozzle for 3 to 5 seconds. This counts down from 10 to 0, enabling accurate alcohol presence detection.
If alcohol concentration is between 0.02%BAC (0.2g/l) and 0.05%BAC (0.5g/l), a caution flag appears signaling to the user to be aware of elevated alcohol levels before proceeding further.
A danger warning alerts users when alcohol levels exceed 0.05%BAC (0.5g/l), accompanied by an audible tone. After 10 seconds, the device powers off automatically. For precise results, repeat testing 2-3 times.
Alcohol Concentration Comparison
America: % BAC
Europe : g/l
Japan : mg/l
China : mg/100ml
Keychain
Keychain Breathalyzer
The GREENWON keychain breathalyzer is designed for use anytime, anywhere, providing immediate alcohol detection with portability and ease of use at your fingertips.
Greenwon Portable Breathalyzer for Alcohol
Energy-Saving & Auto-Off Function
Powered by 2 AAA batteries (not included), this breathalyzer features an automatic power-off after 5 seconds to conserve battery life. Each battery installation supports more than 200 tests, and a low power indicator ensures you're always ready to test.
Reminder: Use AAA batteries only; AA batteries are not compatible with this device.
Designed specifically for AAA battery use, ensuring optimal performance and safety.
Equipped with a high precision semiconductor sensor and a clear LCD display, this breathalyzer provides reliable and easy-to-read alcohol concentration results for personal safety monitoring.
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Size
S
M
L
XL
Men
7-10
10-13
13-15
15-17
Women
7-9
10-12
13-14
15-16
Example Shown : SIZE XL, Hem to Hem 84cm OR 33 ,SIZE L, Hem to Hem 84cm OR 33 ,SIZE M, Hem to Hem 84cm OR 33 ,SIZE S, Hem to Hem 84cm OR 33
Rated 5.00 on the scale 1 - 5 based on 3 customer reviews
Ethan K.
12/09/2025
My New Night-Out Essential
After a close call driving home from a party last month, I bought this breathalyzer to give myself extra peace of mind. Now, before I leave any event, I quickly check my level—the bright, easy-to-read screen and compact keychain mean I never second-guess my safety, and I feel way more confident every time I get behind the wheel.
Sienna K.
12/09/2025
Compact, Reliable, and a Total Game-Changer for Safety
I love how this high-precision breathalyzer combines accuracy with convenience—I've never felt more reassured on a night out. The quick readings and simple keychain design make it effortless to check my safety before driving, and the bright display is a lifesaver in low light. Knowing I have such reliable results and a lifetime warranty truly gives me peace of mind.
Alex B.
12/09/2025
Compact and Reliable Breathalyzer for Night Owls
The very first thing I noticed upon unboxing was how incredibly light and compact this breathalyzer is—barely larger than my car key. The keychain design truly makes it effortless to carry, so I never forget it on a night out. The large, orange backlit LCD is a game changer for late-night use; readings show up bright and clear, even in dim parking lots, which makes checking my safety before driving both quick and stress-free.
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Buying this product you will collect 20 points with our loyalty program. Your can convert 20 points in your account into a voucher for a future purchase.
