An input device for communication with a processor-based device, the input device comprising: a housing; a scroll wheel (140, 540) which is mounted on the housing in a manner so as to be rotatable about a first axis and so as to be partly exposed from the housing to be accessible by a user of the input device, and which comprises an arresting surface which extends circumferentially about the first axis; a lever which is provided with first and second lever arms (163, 165) and which is mounted on the housing so as to be pivotable about a pivot axis which extends between the first and second lever arms (163, 165), wherein a first free end portion of the first lever arm is configured to engage the arresting surface of the scroll wheel (140, 540) with an engagement force to arrest a rotation of the scroll wheel (140, 540) with a corresponding arresting force; an auxiliary wheel which is mounted on the housing in a manner so as to be rotatable about a second axis and so as to be partly exposed from the housing to be accessible by the user; and a motion converter connected to the auxiliary wheel as well as to a second free end portion of the second lever arm, wherein the motion converter is configured to convert a rotational motion of the auxiliary wheel into a linear motion and to apply said linear motion to the second free end portion of the second lever arm so as to pivot the lever about the pivot axis to correspondingly adjust the engagement force exerted by the first free end portion of the first lever arm on the arresting surface of the scroll wheel (140, 540), whereby the corresponding arresting force applied to the scroll wheel (140, 540) is correspondingly adjustable by rotation of the auxiliary wheel wherein the first axis, the second axis and the pivot axis are at least substantially parallel to each other. a housing; a scroll wheel (140, 540) which is mounted on the housing in a manner so as to be rotatable about a first axis and so as to be partly exposed from the housing to be accessible by a user of the input device, and which comprises an arresting surface which extends circumferentially about the first axis; a lever which is provided with first and second lever arms (163, 165) and which is mounted on the housing so as to be pivotable about a pivot axis which extends between the first and second lever arms (163, 165), wherein a first free end portion of the first lever arm is configured to engage the arresting surface of the scroll wheel (140, 540) with an engagement force to arrest a rotation of the scroll wheel (140, 540) with a corresponding arresting force; an auxiliary wheel which is mounted on the housing in a manner so as to be rotatable about a second axis and so as to be partly exposed from the housing to be accessible by the user; and a motion converter connected to the auxiliary wheel as well as to a second free end portion of the second lever arm, wherein the motion converter is configured to convert a rotational motion of the auxiliary wheel into a linear motion and to apply said linear motion to the second free end portion of the second lever arm so as to pivot the lever about the pivot axis to correspondingly adjust the engagement force exerted by the first free end portion of the first lever arm on the arresting surface of the scroll wheel (140, 540), whereby the corresponding arresting force applied to the scroll wheel (140, 540) is correspondingly adjustable by rotation of the auxiliary wheel wherein the first axis, the second axis and the pivot axis are at least substantially parallel to each other.