Does ok except January 2022 when the wife's truck did a roll over total vehicle crash and hung upside down suspended by a seat belt for 45 min in 15 degrees weather detected the crash 8 hrs later and asked if we had a crash maybe it doesn't detect every crash but I think it should in a roll over in an open area I think it needs some explanation why I got a call 8 hrs later asking if my truck was in a accident as it didn't move from the accident scene till 3 days later.