Door BellsGong Buzzers Chrome N/A 8 VacGong Heidemann Gong N/A Chrome N/A 8 Vac Chrome N/A 8 VacGong More sounded Gong Croma Silver N/A 8 and 12 V/AC or 4 x 1.5 V Baby-BatteryGong Pallas two-tone gong Pure white N/A 230 VGong Pure white N/AAll from the category (16)