uxcell English Hello Welcome Speak Door Chime Bell Announce Alarm Sensor Widely used by service business, such as banks, restaurants, cofffee shops, office buildings, home etc. Features white door announcer can speaking hello or welcome, keep politeness in your consumer. Keep an eyes on consumers need, help you to deal with business. Creating a kind feeling, make you feel comfortable and welcomed by the host. Need to install batteries, batteries are not including in the package.