Doorbell, Smart Voice Doorbell 2 Way Conversation Talk Intercom Doorbell Kit Indoor Outdoor Access Control System for Home Office Security

Long Transmission Distance: Our doorbell has long distance transmission and signal and sensitivity, 200m/218yd of empty place, 5-50m/16.4-164yd of place with obstacles; Easy to install, can straightly stick doorbell to the wall with adhesive tape
2 Way Intercom: Highquality twoway calls, volume adjustable and ringtone changeable, clear voice quality and loud speaker sound; voice doorbell, talk to visitors through two-way voice intercom, know who is visiting your home
Safe to Use: Using learning code to code, an outdoor machine support many indoor machines, noninterference. Frequency of Doorbell is in line with the national regulations, will not produce harmful electromagnetic interference
Wide Application: A stylish modern design is simple and elegant, exquisite, the two-way voice intercom doorbell is suitable to home, apartment, school, villas, office, warehouses, house, factory, hotel, hospital, super market and more
Easy to Use: Battery takein and takeout easily for outdoor machine, using 4pcs AAA batteries, and service life can up to four months, but the battery is not included. The indoor machine doesn't need batteries, and it is connected with USB data cable