Do not use Intoxalock ! This company has no idea what they are doing! Arranged to have system placed on the car , had to wait several weeks . When we finally got the appt , the car was rendered inoperable,and had to be towed to a dealer . Very poor customer service , after being told we would not be charged, the company continued to charge my account , even though the system was ever put on the car! Go to Smart Start , this is a very well run operation, they are part of the court system . Dropped the car off , 2 hrs later it was done , excellent instructions were given on how to use the system . I hope someone reads this review before they go to intoxalock !