A laser perforator for perforating skin of a patient and obtaining of blood samples consists of laser light source for producing an output laser beam, a focusing arrangement for focusing the output laser beam at a skin area selected for perforation, a guiding arrangement, a power supply unit and a retaining arrangement for retaining the skin area. A comparator included in a monitor circuit compares an output voltage of the peak detector with a voltage appearing at the capacitor. Further, in this dynamic adaptation, the user sees at a glance as many as possible of the elements of the structure, and the user can see any of the elements at the user’s discretion in a way which is compatible with using structured information such as a menu of choices. The synchronization unit synchronizes a plurality of vehicles with one another using the frame so that the vehicles can perform the autonomous vehicle platooning. The identification number of the recorded medium is analyzed after re-insertion of the medium into the player and play is resumed at the last-play position when the identification number corresponds with the identification number previously stored in memory. Further, the actuating coil is energized in a power saving mode, during a second period after the first period.