The call kit "HostCall-MP-912W2" is designed for light and sound notification of employment and release of employees in offices where visitors are received, and voice calling of visitors to the office. For example: to call a patient to the doctor's office, a visitor to the checkout, etc. the Kit is used in therapeutic, dental, x-ray and other offices of medical institutions, in banks and other systems to invite a visitor to come to the service window, as well as to regulate the behavior of the visitor or manage the queue.