Comes with a usage count function.
You can tell at a glance when it's time to replace it. *The recommended number of uses is 1000 times.
It has a backlight function so it can be used at night.
Comes with fraud prevention function.
Error display function when the amount of exhaled air is small. Product size: 95 x 38 x 20 mm
Weight: Approx. 44g (including batteries)
Material: ABS
Packaging: Gift box
Country of Origin: China
Power supply: 2 AAA alkaline batteries (sold separately)
Number of uses: 1000
