I've tried a lot of other breathalyzer before buying the TM-7500 and they have always disappointed send back the respective seller. The alleged Meters (Price Range from 50 -99 euros) often showed fluctuation of 0.5 per mille and more. How is one to know because if you may still drive or not? The TM-7500 has a handy size is very easy to use and very good + display and provides very accurate results. Who is looking for a breathalyzer which offers great value for money, which was to set the TM-7500. 5 stars from me!