Electromedical implant

The invention relates to an implantable medical device (20) having a transceiver (203) for transmitting and receiving wirelessly transmitted data, which is switched off between individual data transmissions via the transceiver (203) or switched into an energy-saving idle state, and with a wake-up unit (202 ) configured to switch the transceiver (203) to its fully operational state by a wake-up signal from its shut-off state or sleep state, the wake-up unit comprising a low-power receiver (210) and a wake-up control unit (206) of which the low power receiver (210) is adapted to monitor a plurality of predetermined frequency ranges suchthat in the case of a transmission of sufficient signal strength in one of the frequency ranges, it generates an output signal and outputs it to the wake-up control unit (206), and of which the wake-up control unit (206) is designed to evaluate output signals of the low-power receiver (210) and deliver a wake-up signal to the transceiver (203) which turns it on or fully operational if a predetermined condition is met or a plurality of predetermined conditions are met, the wake-up control unit (206) is adapted to apply the wake-up signal to the transceiver (203 ), when the condition is satisfied that the low-power receiver (210) outputs a series of output signals that indicatethe low-power receiver (210) has detected a sequence of (data) transmissions of sufficient signal strength in different frequency ranges, which corresponds to a predetermined sequence / order (of frequencies).