For per-mile insurance customers, the Pulse must be plugged into your car at all times so mileage can be accurately measured and billed. The device also enables other valuable features of the Metromile experience (ex. street sweeping alerts, trip history, diagnostic codes). Of course, when you get your car serviced, it’s ok to remove the Pulse so that the mechanic can access the port. Just be sure to plug the device back in.