ST-965 SALSA wireless network doorbell for 230V socket, range 150m, 64 sounds SUN10000490-WUN

The bell is plugged directly into the 230V mains socket. Battery-free (kinetic) button that does not require any power supply, waterproof. Optical call signaling, useful e.g. for hard of hearing people. Radio transmission (frequency 433MHz). Operating range: 150 m in open areas. 64 sounds and melodies to choose from (very high quality polyphonic),
sound level max. 85 dB. 4-step volume control. Possibility of complete silence (only optical signaling).
Possibility to program 8 buttons for one doorbell.