Cheap door bell, Buy Quality bell foundation directly from China door bell phone Suppliers: Dingdong Musical Melody Doorbell 12V Wired Door Bell For Access Control
Wired doorbell, buzz tone, soft voice loud and clearEasy to install, 12V DC power supply, no battery installed.Dimensions: Length 87 × 62 × 23MMColor: WhiteWiring methods:Wiring (need 12V power supply use):1, red with black 12V power supply positive and negative access terminal;2, yellow with green signal line connected access control (BELL end);Sound is: 80 db;Note: This wired doorbell without the button can only be used with the door access control
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