The AMVOX2 DBS Transponder features a Jaeger-LeCoultre patent which has revolutionized the watchmaking world: the vertical-trigger chronograph. Gone are the "traditional" push-pieces so characteristic of chronographs. They are replaced by an amazing new mechanism that makes it possible to start, stop and reset the chronograph functions simply by pressing on the watch's sapphire crystal surface. The lucky owner will enjoy the privilege of driving his watch like his car. A single movement, so natural that it becomes an extension of the hand, is enough to operate the various functions at any time and without disturbing the user's concentration. The chronograph function can be triggered (start) and disengaged (stop) by pressing the sapphire crystal at the 12 o'clock position, while resetting is done in a similar way by pressing at the 6 o'clock mark. The vertical-trigger system ensuring this fabulous user-friendliness is based on a mechanism integrated within an unprecedented watch case. Inside, a clever ball-joint system allows both the case and bezel to pivot away from the shoulders of the watch, activating a series of levers that instantly transmit impulses that control the chronograph. Each lever is mounted on a miniature stainless-steel ball bearing containing seven 0.1mm-diameter balls. A three-position cursor rounds off this revolutionary construction. Positioned on the side of the case at 9 o'clock, this selection device serves to lock either the whole set of chronograph controls or only the resetting device, thereby ensuring that the functions are not accidentally started, stopped or reset by the driver’s inadvertent hand or arm motions.