Additional gong unit for FD20 / FD25, with Euro plug for Euro/Schuko sockets. Easy registration of the bell button or motion detector on the gong unit. Gong unit with a 4-LED flashing light and optional gong or siren tone (max. 82dB(A)/0.3 m). A total of 24 melodies can be selected. 4 adjustable volume levels or silent optical signal only via flashing light. Power supply: 230V, 50Hz. Dimensions: 80 x 87 x 28mm. Up to 8 bell buttons / motion detectors can be registered on a gong unit, with individual melodies for easy call differentiation. The number of gong units per bell button / motion detector is not limited, but note the radio range.