Breathalyzer Test Winner, Police-Accurate Alcohol Test, Breathalyzer with 6 Mouthpieces. Simply insert the two 1.5V AA batteries, turn on your breathalyzer, and start testing. 【Automatic alarm function calculation of power saving mode】 If the test result exceeds 0.5‰ BAC, the breathalyzer warns you with an audible alarm.
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