The Greenwon AT838 is a digital breath alcohol tester designed to provide quick and reliable sobriety checks. It features a simple single-button operation with a built-in countdown timer, delivering a measurement in just 10 seconds. The results are displayed on an LCD screen with a red backlight for better visibility, supporting three different units: % BAC, ‰ BAC, and mg/L. To ensure safety, the device includes sound signals and visual warning messages that trigger at specific alarm thresholds, such as 0.05% BAC or 0.25 mg/l. Constructed from lightweight ABS plastic, this dark grey device is highly portable, weighing only 40.3 g and measuring 78 x 57 x 15 mm. It runs on two AAA alkaline batteries, which allows it to fit easily into a pocket or glove compartment for use on the go. The package comes with five disposable mouthpieces to maintain hygiene between different users, along with a user manual to help you get started.