This is a loud 4'' bell buzzer by Carlon packs a punch. Easy to install, is perfect for loud areas such as shipping areas, warehouses, shops, etc. When an electrical signal is sent to this buzzer, the buzzer's hammer hits the bell to generate a loud ringing buzzer sound.
Unless you are replacing your current doorbell or buzzer, this will need a push button, bellwire, and a 8-16 V transformer to work.
If you have an office, warehouse, or similar situation and need to know when a delivery truck or customer is at your door, this is a great product to use.