Very useful in cold weather

This Compustar starter can reach up to 3000 feet away! yes I can start my car inside the shopping mall while walking toward the parking lot. The engine will run for 20 minutes and automatic cut off in case I forgot to get to my car. It's an awesome device when the weather is freezing out, I can start up the vehicle while in door and have it warm up before getting in. Especially when taking my kids to school in the morning during winter time. Highly recommended.