This unit is very easy to turn on and use. It has a countdown of 15 seconds before you blow into the device. It comes with extra mouth pieces and you really won鈥檛 ever have to purchase more. The only thing I noticed was a small negative is it did not beep to alert you to stop blowing when the sample was complete, but that wasn鈥檛 a big deal as after a few uses you know how long to blow. This is a nice product and I would definitely recommend it.
This unit is very easy to turn on and use. It has a countdown of 15 seconds before you blow into the device. It comes with extra mouth pieces and you really won鈥檛 ever have to purchase more. The only thing I noticed was a small negative is it did not beep to alert you to stop blowing when the sample was complete, but that wasn鈥檛 a big deal as after a few uses you know how long to blow. This is a nice product and I would definitely recommend it.