Versatile Functions-- Widely used in reception areas, restaurants, bars, hotels, shops, offices, schools, libraries, nurseries, hospitals, family. Perfect as a teacher's bell, play bell, service bell, call bell for the elderly, dinner bell for children or pets, warning/fire bell. A wonderful decoration for New Year's Eve, Christmas market, wedding or daily life. Clear and Loud Sound -- Sounds through the beat with a metal ball inside, produces clear, loud sound that quickly grabs the attention of groups. The sound of noises from home, playground, club, wedding hall can also be heard. Easy to Use -- Easy to use, no electricity or batteries required. Only when you shake the bell, the bell will ring clearly and loudly. Perfect doorbell for those with mobility issues or lost their voice when they need help. Material & Size-- Made of high quality zinc alloy, durable, rustproof, not easy to break. Dimensions: about 5.5 x 5.5 x 11.3cm, small and exquisite. Weight: 100g