The company is a scam. I had two installations on two different cars. I had two rebate coupons but they would only give me credit for one. I also got an error code sync. I called customer service and after waiting 20 minutes for a person they told me how to fix it. It happened again so I just fixed it myself. Then I got a violation 40 message. I was told I wasn’t supposed to undo the battery without having a Intoxalock rep on the phone! They wanted to charge me $75 for lockout plus the $25 from Xtreme to recalibrate!! Whenever I call there it is always a 20 minute wait on the phone to speak with someone. The call center is in India not that that has anything to do with it. Look to a different IID if you can.