*Voice Intercom Doorbell Wireless Indoor Talk Home Security Access Control Syste
Feature: \n 1. 1500M ULTRA LONG CALL DISTANCE: Voice intercom doorbell adopt a professional walkie talkie chip. In a flat and open place, the theoretical call distance can 1500M, making your contact more convenient\n2. EXCELLENT WALL PENETRATION: Wireless voice intercom doorbell use 462MHz radio frequency for wider signal coverage and easier wall penetration\n3. CLEAR SOUND QUALITY: Wireless voice doorbell use noise reduction technology, intelligent noise reduction to make your calls clearer\n4. 3 LEVELS OF VOLUME ADJUSTABLE: The elderly can also hear, the highest volume of 2 way talk doorbell is not less than 112 decibels, whether in the bedroom or in the kitchen can be heard\n5. DURABLE BATTERY LIFE: 1 way talk doorbell internal and external machines are built with 2000mAh rechargeable lithium battery, lasting life is no problem\n6. STRONG INTERFERENCE RESISTANT ABILITY: Voice intercom doorbell has 3 individual channels to choose from, easy to avoid interfering wireless frequenci:
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