elevator arrival gong MGONG-FX + TG024 Arrival Gong + Chime ADA

MGONG-FX + TG024 Arrival Gong + Chime ADA Arrival Gong/Chime , Typical Applications: For Car or Hall audio indications , Features: Adjustable Volume , Compact Design , Conforms to ADAAG 4.10.4 , Voltage 12~35VDC , Selectable Common (24vdc or 0vdc). The audible signal will sound once Up and twice Down.