ARB Tire Pressure Gauge with Deflator Function, Bar/PSI Display, 0-4 Bar

A really clever, new accessory from ARB is the tire pressure gauge with a quick deflator function, which makes it easy to lower tire pressure for off-road use.

Here's how it works:

First, place the attachment on the valve and then unscrew the valve core – ensuring it won't get lost. The desired tire pressure is then set using a sliding valve. This can be done very precisely, as the tire pressure can be read on the gauge. Afterward, screw the valve core back in and "done!"