I joined by miles and have been sent the tracker. The tracker seemed faulty as I plugged it in the obd-2 socket it disabled my tyre inflation system, electronic brake system, engine system and car start system meaning the engine would not start to work, the car was dead! The first repair has cost me 1100. I contacted by miles and was asked for the miles tracker serial number. A software update would be given and I should try again. So I tried it again for a 2nd time and same faults again and the car needed a repair again this time it has cost me 350. I had my car repaired for a summary of 1450 and all I received is my insurance refund and an apology. No compensation or refund for the repair costs. Avoid!