Door AnnouncerDoor Announcer, SH111
When visitor knocking the door, the unit will gives out "DING DONG" to announce their arrival
Hi/Low Volume control for "DING DONG" melody.
Operated by 2 x 1.5V AAA batteries
Product size: 53 x 25 x 71mm
- commercial security system, visitor chime, door bell, door chime