I purchased this for two reasons. I have noticed my brand new TT (1985) has a very very slow leak on one tire. I have a standard air compressor at home, but I'm always afraid at a campground I'll be below the safety margin and have to find a fuel station with a hose I can easily maneuver to. This was a bare tool only model, no battery. That's OK because all my tools are DeWalt already and I have plenty of batteries. This now rounds out the tools I carry in the TT. Impact Hammer Drill, Impact Wrench, and now Tire Inflator.
It's so easy to use. You first dial in the desired tire pressure to the 1/2 lb level. Screw the chuck onto the tire valve (no holding a chuck by hand). Finally push a button and watch it inflate to the desired level and auto turn off. So easy, and it doesn't weigh much.
You can also inflate balls and air mattresses as well. Or deflate the air mattress.
I'm going to look and see if it has a presto bicycle adapter. Then I can put away that onery hand pump!