The Smartphone breathalyzer is accuracy with fuel cell sensor, and you can connect to your Smartphone wirelessly with auto-pairing. It is easy to use.
You may share test result with your family or friends by SMS, Facebook or Twitter.
The power supply is 1 piece AAA alkaline battery, which you may purchase and replace easily. The battery may use about 300 tests or 12 months.
There is a function of sober estimation on APP, which calculate the rough time for sober and safety alcohol level. It reminds you the time for next test.