SureScreen's best selling Alcometer. Suitable for UK/USA markets and approved to US Coastguard standards. Quick and easy to use. Highly accurate reading using a selective advanced semiconductor oxide sensor to give you an accurate measurement of your alcohol level in seconds. Digital Display - 3 digits (0.xx% BAC/BRAC) Wide Detection Range:~0.40% BAC or 0.00~2.00 mg/l Compact, lightweight, short warm-up time and reset time for repeat readings. Up to 700 tests without recalibration Inexpensive recalibration service available in-house in our forensic laboratories Long detector life 9V Alkaline battery & in-car cigarette DC adapter included in a nice hard shell case and soft zipped pouch. Perfect for company screening, drivers and warehouses, and personal use; also ideal gift for testing the morning after a party to make sure you're safe. Includes 5 mouthpieces, and inexpensive replacements are available Alarm sounds for high readings