Winter cold in my area of the country. Last week I was waiting in LONG lines for "open air" for one of my tires. Ordered and received on 12/30/17; it came fast. Today (12/31/17) my son's tires were low; one is critical at 20 psi! At the local WaWa, 10 cars were waiting for "free air". So we got out my new air compressor and used it on his car with DC power. It worked fantastic! We filled his tires at about the same time as the "free air" at the store - no waiting around! I'll order another one so he can have it in his car. Good carrying case with all adapters and runs on AC or DC power. I connected my tire pressure gauge to it. Some will say it's loud, but to me it sounds like a regular air compressor! :-)