Additional transmitter and magnet to help monitor doors. Alarm or chime sounds when transmitter and magnet are separated. Uses a 6 volt alkaline battery (installed) and has 32 frequency codes to help reduce interference.

There are thirteen sounds that can be selected with the push of a button on each transmitter. 

Features

Selectable sound options are:

• "Dong"
  
• "Ding Dong"
• "Westminster Chime"
• "Star Spangled Banner"
• "Hail! Hail! The Gang's All Here"
• "Jingle Bells"
• "Auld Lang Syne"
• "Dixie"
• "The Yellow Rose of Texas"
• "Happy Birthday"
• "Beethoven's 5th"
• "Joy To The World"
• "Take Me Out To The Ballgame"