I had installed in oct 10 of 2017./since then violocked me out 7 times in first month first time 2 hrs after install then every month at 3rd week just before time to recalibrate .they r rude. talkkes at least 1 hr or more to reach by phone cant reach local phone number supose to cost $70.00 a month for service but cost with it constantly vio locking me extra $53.00 totaling $123.00 a month have read same complaints all over usa with same results go to motech they have 85% excelant6 rating by customers same price for monthly calibration fee but only 35.oo if locked out plus they will give u code over phone so u dont only have 4 days to go pay extra $53.00