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MORE CHOICES: 32 different ringtones and 4 adjustable volume for you to select. You can set different ringtones and volume by the occasions at any time
EASY USE: Install a CR2032 coin-cell battery for the button then stick the button to the wall or door frame, plug the receiver into the socket, they are ready to work
LONG RANGE: The transmission distance between the receiver and button can reach 500ft in open space, ensure you won’t miss any visitors
LED FLASH: Flashing light with audio alert indicators which is easy for people including the hearing impaired to notice
PACKAGE CONTENTS: 1 black receiver, 1 black button(Not Includes one CR2032 coin-cell battery ), accessories for button to install