Use suggestions:
1.Turn the unit on by pressing the OFF/ON button.
2.Put the gauge on a flat surface, and hit the ZERO button. This calibrates the gauge.
3.Place the gauge on a guitar neck. The accurate tip should be in the center of the tip rail. This will give the tip opening measurement. Switch between inches and millimeters by pushing the INCH/MM button.
Specification:
Material: metal + plastic
Color: Black,Silver
Size:12x12x3cm/4.72*4.72*1.18inch
Package:
1x Digital Tip Opening Gauge Set