Ding Dong Bell Manual Doorbell Chime,ding Dong Bell Manual Doorbell Chime, Doorbell, Doorbell, Doorbell, Doorbell, Doorbell, Doorbell, Doorbell Baobao Safe and durable Made of fireproof ABS shell, sleek design, practical and durable. Mechanical doorbell design for use with most doorbell switches. Portable Compact size, light weight, wall installation is simple and convenient, no need for complicated tools, save time and effort. Loud and penetrating sound With 85-90dB doorbell chime, it is easy to be heard when someone presses the doorbell to access it. High power speaker, provides loud sound and strong penetration. Easy to use Installation is simple and convenient, no battery is installed and the power supply is directly connected. The mechanical doorbell can be used with most doorbell switches. Delivery quantity: 1