Wired doorbell Sverchok trill 220V 80-90dBA adjustable volume white MONOMAKH SV-03R

• PURPOSE Electronic household doorbells are designed to provide an alert signal. • APPLICATION AREA Used in residential and office premises to notify those present. Most common in residential apartment buildings in individual apartments as a device to notify of a visitor's arrival. • PRINCIPLE OF OPERATION Notification is performed by pressing a button located outside the notified area, connected to the main device via wired or wireless communication. Depending on this, electronic household doorbells are divided into wired and wireless. The signal is emitted by the main device by playing a melody. Power for the device and the button, depending on the specific device, is supplied by replaceable batteries or the 220 V mains. The design of the main device is based on a semiconductor circuit that generates various sounds and melodies. Certain devices allow playing a music file in mp3 format from an external storage medium as an audio signal. • ADDITIONAL ACCESSORIES OR ACCESSORIES The standard configuration usually includes the main device that emits the alert signal, as well as a button for remote installation. Depending on the specific device, batteries may be included in the standard delivery set.