Labeled[Slider[Dynamic[f], {f1, f2}], Style[#, style] & /@ {"frequency", Row[{Dynamic[f], "Hz"}, Spacer[2]]}, {Left, Right}] 
kglr
- 403.4k
- 18
- 501
- 959
Labeled[Slider[Dynamic[f], {f1, f2}], Style[#, style] & /@ {"frequency", Row[{Dynamic[f], "Hz"}, Spacer[2]]}, {Left, Right}]