VPOW Alcohol Breathalyzer VPOW Professional Breathalyzers Alcohol Tester with 10Pcs Mouthpieces for uk. Product Description Alcohol tester breathalyzer for uk with advanced semi-conductor sensor ensures accurate readout in a short time. The backlit LCD screen makes it much easier to use at night. Small portable size, you can put it in your pocket or bag, so you won't forget to take a test before you start the car. 12 Interchangeable mouthpieces, It's healthier to do multiple tests for multiple people by replacing the mouthpieces. VPOW Alcohol Breathalyzer Size Length 2.9cm × Width 8.9cm × Height 16cm Packing included 1×Alcohol Breathalyzer 10×Mouthpieces 1×Carrying Case 1×User Manual Warm Tips Must be equipped with a mouthpiece before blowing. DO NOT test immediately after drinking alcohol. Test after drinking alcohol for 20 minutes and rinse your mouth with water firstly. DO NOT blow air immediately after turning on the machine. The product will have a self-cleaning time of 15 seconds every time it is turned on. DO NOT blow hard directly on the air inlet of the product in any case. After 15 seconds of starting up, it will enter the blowing countdown. The countdown is 10 seconds. When blowing, it should be blown out evenly until the displayed value is, DO NOT suddenly big or small or interrupted, repeat the above operation 3-5 times, the result is based on the average value.