The retail package for a perishable product comprises a box as an outer package； and an electronic tag for obtaining information relating to the integrity of the product as assessed from an exposure of said product to physical or environmental conditions during a time span. The tag comprises a main part comprising an electronics unit and optionally a rip strip comprising a breakable electrical connection operationally connected to said electronics unit. The electronics unit comprises a control unit； a sensor unit comprising at least one sensor for monitoring said physical or environmental conditions； a display unit comprising a display for displaying data relating to said integrity referred to as status data； and a switch. The control unit is structured and configured for effecting that said display unit displays said status data in reaction to an operation of said display switch； and wherein one or both of:— said display unit comprises one or more light emitters for emitting light pulses, and wherein said data is encoded in a sequence of light pulses emitted by said one or more light emitters；— said display unit is structured and configured for displaying said status data by flashing, said status data being encoded in said flashing.
