This is a very good product to be with you all the time. It has torch as well, when in need. Very good at inflating tyres. I use it every week to check the pressure and to fill it. The only design suggestion I would like to give the seller/producer is that when you tighten the knob to the tyre, it loses some amount of air. If something can be done, like a one-way valve, it would be really perfect. Due to this, I have to increase the psi one or two points more to compensate for the loss of the air, while attaching and removing the nozzle.