Waterproof Wireless Door bell Function memory: remembers your last song and the volume level according to a current display, no need to initialize your parameters; design practical and easy to use for a better user experience(Version non French)38 melodies, 3 volumes and mutiThe door sensor receiver has 38 tones and 3 levels of volume adjustable (0 dB 110 dB) to respond to your different needs occasions. Press the button Follow or Proceed to choose easily among 38 melodies.Se connect easily: easy installation n'import or in your home. While the other wireless sonnets are difficult to install or do not work in a constant manner, the sonnets are based on plus 300 meters of door in open zones and are proven to operate through doors and walls. Ideal for large houses, apartments, offices and entrances. And with a battery autonomy of up to 3 years, you will never miss a carillon. Use it as a carillon for work or as a doorbell for teachers.