High quality bell with good sound intensity. It is suitable for new 75VAC wiring in conjunction with SONTEK D204PQ control panel, as a replacement for the older 75VAC bell type or extension of existing wiring. 
                    
                    
                        bell parameters QUATRO 75:
     power supply 75VAC
     sound intensity 73dB / 1m
     power consumption 50mA at 75VAC
     dimensions 208 mm x 102mm x 60 mm
     weight 0,5 kg
     wall mounting