Abstract: A doorbell (2) includes an operation unit (22) capable of performing a calling operation, a camera (26), a microphone (23), a speaker (24), and a control unit (21) connected to the operation unit (22), the camera (26), the microphone (23) and the speaker (24) and capable of performing direct or indirect communication with an external device in which delivery item information relating to a delivery item is recorded. The control unit (21) is configured to acquire the delivery item information from the external device, and based on the delivery item information, to transmit a delivery notification of the delivery item to an information terminal (3) associated with a resident of a residence to which the doorbell (2) is attached.