Review: Tyre Deflator

I have tested the deflator and it works as described. The pressure it deflated to was very close to my tire gauge pressure and not sure which was the correct reading. I plan on a trip along some sand/dirt roads and will use it to deflate my tyres prior to the trip. I agree with another comment below that it would be good to have more than one as with the van I have 6 tyres to deflate, but as we are retired time is not of the essence.