Never take risks when driving, always drive when you are alert and sober. A breathalyser enables you to check that you are not over the limit before you begin to drive. A breathalyser is easy to use and pocket-sized so it is handy to take it with you. It is good practice to test yourself before you are going to drive, especially if you have had a few drinks the night before. Read the instructions carefully if you have not used a breathalyser previously so that your results are reliable. Ensure that your home breathalyser device is calibrated to ensure proper results. Home breathalysers are becoming more popular to help ensure you’re under the legal drink-drive limit when you drive the morning after a night of drinking and celebrating. Using your own judgement your breathalyser can give you an indication of whether you should take the wheel the morning after drinking alcohol or whether you should let someone else drive. Knowing your blood alcohol content helps you to make a wise decision.