[Non-contact detection] It can be easily measured with one shot. It can be used by one or more people. It is very hygienic and can be used after being turned on and warmed up for 10 seconds. High-precision detectionEquipped with ultra-high precision sensor, just blow a blow, and the result will be detected after a few seconds, it will automatically remove excess air to ensure fast and accurate detection. [Test Results at a Glance] The LCD screen displays the value, and the breathalyzer has three lights, red, yellow and green, red light: intoxicated state, yellow light: drunk state consumption, green light: non-consumption status. USB Rechargeable Alcohol TesterThe portable alcohol tester is charged by USB, which is different from battery replacement. It can be used about 300 times when fully charged within one hour. It is also very practicalto charge via USB in the car, computer, outlet or power bank. The compact body can be carried anywhere.