30Hz to 100Hz vertical and horizontal geophone. CDJ middle & high frequency geophones, 4,10,15,28,30,40,60,80 or 100Hz, are widely ... -Z/P30CDJ-Z/P38CDJ-Z/P40CDJ-Z/P60CDJ-Z/P100 Vertical/HorizontalVertil/HoriVerti/HoriVerti/HoriVerti/HoriNature Frequency Fn (Hz)30±5 ... )8686867878Case Length (mm)50Case Width (mm)Ø40Case Height (mm)68(Vertical) / 62(Horizontal)Weight (g)255247 30Hz-100Hz Geophone