The ekey net surface-mounted control unit with three relays can control three devices with its three relays. This control unit is used to open building doors, company doors, garage doors, etc. The control unit is intended for use in the home and business sector. The ekey net surface-mounted control unit 3 is intended for installation on immovable parts such as walls and for use in protected indoor areas. To operate it, you also need a suitable finger scanner, an ekey net converter LAN, a suitable power supply and the complete ekey net software.