A pipette with an adjustable dosing volume, comprising: - a rod-shaped housing, - at least one seat for releasably holding a pipette tip to a lower end of the housing, - a displacement device comprising a displacement chamber fixedly arranged in the housing having a displacement element displaceable therein, - a connecting channel connecting the displacement chamber to an opening in the seat, - a stroke rod coupled at the bottom end to the displacement element and displaceable in the longitudinal direction in the housing for displacing the displacement element in the displacement chamber, - a control button connected to the upper end of the stroke rod and projecting from the housing, - a stop element on the outer circumference of the stroke rod, - a threaded spindle that has a central spindle hole through which the stroke rod is guided and that has an upper stop at the bottom for the stop element, - an inner thread arranged in a fixed position within the housing in which the threaded spindle engages by an outer thread, - a lower stop arranged below the upper stop at a distance therefrom for the stop element, - a catch sleeve rotatably mounted in the housing that has at least one groove running in a longitudinal direction on the inner circumference in which at least one catch of the threaded spindle engages, - a counter for displaying the dosing volume that is designed and arranged to detect the rotation of the catch sleeve, - an adjusting sleeve rotatably mounted in the housing, - an adjusting element accessible from the outside of the housing and connected to the adjusting sleeve, - a transducer shaft rotatably mounted in the housing and parallel to the adjusting sleeve and the catch sleeve, - wherein the adjusting sleeve has an input shaft, the catch sleeve has an output shaft, and the transducer shaft has a countershaft of a gearbox designed as a spur gearbox that has a shifting device with a shift element accessible from the outside of the housing, wherein the gearbox is designed, by actuating the shift element, to shift various shift stages with different gear ratios between the rotational speed of the adjusting sleeve and the rotational speed of the catch sleeve. - a rod-shaped housing, - at least one seat for releasably holding a pipette tip to a lower end of the housing, - a displacement device comprising a displacement chamber fixedly arranged in the housing having a displacement element displaceable therein, - a connecting channel connecting the displacement chamber to an opening in the seat, - a stroke rod coupled at the bottom end to the displacement element and displaceable in the longitudinal direction in the housing for displacing the displacement element in the displacement chamber, - a control button connected to the upper end of the stroke rod and projecting from the housing, - a stop element on the outer circumference of the stroke rod, - a threaded spindle that has a central spindle hole through which the stroke rod is guided and that has an upper stop at the bottom for the stop element, - an inner thread arranged in a fixed position within the housing in which the threaded spindle engages by an outer thread, - a lower stop arranged below the upper stop at a distance therefrom for the stop element, - a catch sleeve rotatably mounted in the housing that has at least one groove running in a longitudinal direction on the inner circumference in which at least one catch of the threaded spindle engages, - a counter for displaying the dosing volume that is designed and arranged to detect the rotation of the catch sleeve, - an adjusting sleeve rotatably mounted in the housing, - an adjusting element accessible from the outside of the housing and connected to the adjusting sleeve, - a transducer shaft rotatably mounted in the housing and parallel to the adjusting sleeve and the catch sleeve, - wherein the adjusting sleeve has an input shaft, the catch sleeve has an output shaft, and the transducer shaft has a countershaft of a gearbox designed as a spur gearbox that has a shifting device with a shift element accessible from the outside of the housing, wherein the gearbox is designed, by actuating the shift element, to shift various shift stages with different gear ratios between the rotational speed of the adjusting sleeve and the rotational speed of the catch sleeve.