Two-Way Talking Doorbell

• Internal line phone call intercom.

• Energy efficiency design and convenient operation.

• Clear communication both sides of the two intercom.

• Elegant appearance.

• Installation is very simple.

• The bell ring loudly and clearly.

• As long as the extension cable conductor material is good, effective distance can be as high as 8m apart.

• The product quality is very reliable, low voltage power supply security communication convenient.

• It is the first choice of realizing internal communication products.

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SPECIFICATION

• Noise voltage <10mV
• Ring level > 70dB
• Static current <5uA
• frequency property +-3dB