In order to achieve a comfortable level of spray noise using a cap having a button and an angled spray channel, it is suggested that the spray channel be manufactured in one piece from elastic plastic, e. Incoming wastewater to be treated is channeled to at least the first and a second marsh cell, and a portion of water exiting a final marsh cell, to the first marsh cell surface. A characteristic of the intended recipients are compared with a maximum recipient limit for the file attachment. The master apparatus can read the system information data in the slave apparatus in the order specified by the serial conversion order control signal. The control unit may coordinate the converting units based on a conversion request to convert electronic data in a first data format into electronic data in a second data format, in order to make the converting units execute a data conversion from the first data format to the second data format.