ADVANCED TECHNOLOGY The alcohol tester adopts advanced sensor technology,can provide you with accurate and reliable results in seconds, fast response and reply, so that you can get the results you want as soon as possible. ENSURE ACCURACY The breath analyzer for alcohol with independent blow hole and LCD backlight display,which can isolate ambient air, gases, and fumes when not use, guaranteed accuracy of results. PORTABLE & LIGHTWEIGHT Only weighing 36g, it is small enough to fit in a purse or pockets and any other small space. With backlight LCD display, make it much easier for the night display and give you professional accuracy for safe driving. EASY TO USE The Alcohol Tester is extremely easy to use. Simply insert the two included AAA batteries( Not Included ) power on your breathalyzer and begin testing. It's that easy. Your BAC results quickly on a bright, easy to read LCD screen. SATISFACTION GUARANTEE We strictly control the quality of each product to ensure that every user can get the perfect product and enjoy the best quality service. If you have any questions about our products, please feel free to consult.