The set consists of a doorbell button (transmitter) and a chime (receiver). The chime is designed for constant connection to a 230 V AC/50 Hz power grid. Transmission between the button and the chime is carried via radio waves at a frequency of 433.92 MHz. The range depends on local conditions and reaches up to 150 m in an open area without interference. The set has a self-learning function, allowing the button to generate its own pairing code, which is then received by the chime and stored in its memory. The set can be expanded with additional buttons. The self-learning function also prevents interference with neighboring doorbells. For proper usage of the wireless doorbell, read the instruction manual thoroughly.