Easy to use, and no installation needed. Place one in any hotel front desk, office, reception area, restaurant, warehouse, or hospital. Ringing sound is loud and clear for an audible sound whenever you need to get the attention of a worker, family, or friend. Great for pet training as well! Let your dog (or cat, rabbit, hamster) know when it's feeding time, potty training time, or give this bell a ring when they do something you're happy or unhappy with. Every time this bell rings they'll know what it is you're thinking! Comes in a pack of 1 silver metal anti-rust call bells. Each bell measures 3.35" inches. The desk bell sound is loud, even in a noisy restaurant or outdoors, you can hear the sound.The bell also helps the elderly to ask for help. Our training bell is very suitable for pet potty training. It can be used as a communication device or a good toy. For example, it will be fun to give pets some snacks when ringing the bell. It can be used in restaurants, waiter counters, shops, help for the elderly, pet training, or as a game teaching prop for children. More scene applications are waiting for you to discover.