Lifesafer takes the accuracy of their ignition interlock device (IID) seriously. One way the company ensures the accuracy of its device is through a process called calibration. During calibration, the device is checked to ensure that it is providing accurate blood alcohol concentration (BAC) readings. This can be done by using a known alcohol solution or by having a person blow into the device with a known BAC. The device's readings are then compared to the known BAC to determine the accuracy of the device. Additionally, Lifesafer conducts regular laboratory testing to ensure its devices meet the required standards and specifications set by the National Highway Traffic Safety Administration (NHTSA) and other regulatory bodies. The devices are also subject to regular inspections and maintenance to ensure they are working properly. It's also important to note that the accuracy of the IID also depends on proper usage and maintenance of the device by the customer, such as regular calibration checks and following the instructions provided by the manufacturer.