A package of rolls obtained by a wrapping machine includes: a group of rolls composed of at least three layers of rolls, situated one over another; a sheet shaped in tubular form for wrapping the group of rolls, with the relative longitudinal edges overlapped and heat-welded, and with the wings of each head of the tubular sheet being folded against the rolls and then stabilized by heat-welding. A tongue is attached to said wrist strap which extends toward an open palm of a hand of the user. An aggregator device is disposed to receive data and statistical information from the plurality of collector devices. The first transistor includes first, second and third terminals connected to a data driving line, a first control signal source, and the second node, respectively. A reset control circuit may receive a feedback signal from the output logic circuitry and an intermediate signal from the input logic circuitry and generate a reset signal based on the received feedback and intermediate signals.