This electronic mini pressure gauge with a diameter of 28 mm is a great upgrade for your rifle and can be use on for example your FX Impact or Edgun.
It has the same diameter as the currently used big pressure gauges on the Impact MKII (28 mm diameter) and with the black cover included it is 32 mm in diameter. The height of the gauge is 24 mm.
With the just one button operation mode you can switch the gauge on and it will display the pressure in bar for about 30 seconds before going into the sleep mode again.
A large opening in the housing makes it very easy to change the battery and due to the cover it is fully out of sight.