For all orders exceeding a value of 100USD shipping is offered for free.

Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.

Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.

【Save the data】Our product is a professional alcohol testing instrument, which can store and share your data, which is very convenient

【High quality materials】Using the highest-level fuel cell sensor, coupled with real-time correction technology in the background, only a high-precision household alcohol tester is made.

【Reduce data differences】It solves the problem that the impact and alcohol residues of ordinary sensors cause misjudgment of the display results of the instrument during the detection of alcohol.The accuracy increased by 48.2%.

【Support all aspects of the system】Our products can automatically calibrate the sensor, and there is no need for a mouthpiece, clean and hygienic, and convenient for multiple people to use. Can support IOS, Android, Google system.

【Our after-sales service】We have a professional after-sales and R&D team. greenwon has been doing alcohol testers for more than 20 years. If you have any questions about our products, you can contact us at any time, with a 1-year warranty and 24-hour online service for you.