Easy to understand how to use the inflator which is a good thing as the instructions have some of the worst English translations I have come across. The device is lightweight and the digital controls are precise, easy to set up and accurate. Auto power off is a good feature that prevents your car battery from draining. Loud but not an instrument I will use indoors. Supplied with various attachments for sports equipment AND ADDITIONAL SAFEGUARDS! It's great to have fuses because if a fuse ever blows, standing by the side of the road on a cold rainy night I guarantee it will! Also comes with a durable nylon storage bag. Unfortunately, about 1/2 inch is too thick to fit under my SUV's seats, so it rolls around in the cargo area. However, I would very much like to buy this device again - I plan to buy it again to gift a new driver. in the family.