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HF-3207A With Interlocking Doorbell

 Interlocking Doorbell

1. Two-wire connection, with unlock function, can be equipped with access control.
2. There is excellent side tone circuit, intercom sound clear.
3. Effective speaking distance of more than 200 meters (2X0.8mm).
4. Aluminum outdoor unit with anti-oxidation and wear-resistant surface treatment, durable.
5. Indoor unit: L230mm × W90mm × H65mm
6. Door machine: L127mm × W95mm × H35mm
7. Weight: 1 kg / set
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