4-inch stainless steel electric doorbell, internal spark-proof bell type, 220V 10W, for audible signals and alarms in large public places --

【Material】 The doorbell hammer is high quality and the bell sound is graceful. It is safe to use in all weather conditions, making it ideal for year-round use.【Easy to Install】 The easy-to-install button adheres well to any surface, or use the screws to fix the button to the door frame. Simply plug it in and you're ready to go; it can be installed anywhere easily.【Material】 The doorbell hammer is high quality and the bell sound is graceful. It is safe to use in all weather conditions, making it ideal for year-round use.【Loud Volume】 Suitable as a sound signal and alarm in factories, schools, railways, and indoor public places, you won't miss any visitors, even if you are in several rooms.【Internal Striking】 The electric doorbell is a type of internal striking mechanism without Sparkle. If you have any questions, please email us with your order number and your questions. Note: All data is measured manually; please allow for a 1-3cm error. Due to differences in lighting and display, there may be some color variation; please refer to the actual product received.