I had dascam to be installed, they told me it cost $85 and made an appointment for 2 days later, next day they called and left a message that my dashcam uses 5 volt but tbe cigarette lighter uses 12 volt, and cost is going to be $175, there was no way they would known if it was 5 or 12 and I looked at manual, it was 12 volt, I guss they saw me that I was interested to do this and tried to overpriced me.