A1 Interlock Devices provides Interlock Devices and breathalyzers in St. George, Washington, Hurricane Utah and more. We offer the best choice for you by providing the best customer service, contract management and installation are both managed in the state. We are locally owned and operated. We install, service and handle the contracts by a locally owned company. We give you a fast, friendly and professional ignition interlock service, and be rest assured that we understand your needs. Look no further to book your appointment with us now. Give us a call today for more information or to book an appointment at (385) 246-4179. This location does offer mobile service installation