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• 12V Wired Doorbell 4 Core Wire Access Control System Home Hotel External Door Bell Features: 12V external wired doorbell, clean to install, little need to exchange or add batteries, long-lasting Clear and loud sound, ding-dong ringtones output Specifications: Working power supply: Voltage: 12VDC Working current: 20mA Working ambient temperature: -10 ℃ -45 ℃; Working relative humidity: 40% RH-90% RH; Product Color: White and spray silver; Material: ABS plastic material, anti-oxidation or discoloration Installation: Wall placing or double-sided adhesive paste Overall size: 86 X 86 X 25 mm/3 X 3 X 0 in Note: 1 enable 1-3 cm differs due to handbook size 2 to different exhibit and varied light, the picture might not show the particular colour of the thing Thanks to your realizing 1 X Door bell

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