The Sontex 624 is a M-Bus remote display for up to 30 M-Bus meters that can easily be read on site directly from the display. The remote display can be operated over the push buttons or over a simple software via the optcial probe. The meters are detected autmoatically. The read out of the data is possible via the intergrated RS232 interface from PC on site or via a modem. The number of the predefined M-Bus meters can be extended by implication.