As a professional wireless doorbell manufacturer Advante Electron Ltd. can design new items and develop music IC by ourselves. Our company was found in 1994 and develops stronger and stronger.,br>brOur new items contain the following special features>br<1 IP44 approval water-proof transmitter)br2> With 32 sounds selectable can set sound at transmitter or receiver,br3> Passed CE and FCC certificationbr<4 Can be installed in 64 channels to avoid interference according to clients) requirementsbr