Feature: 1. Clear Sound Quality: Enjoy clear and crisp two way voice communication with the intercom doorbell, ensuring you can hear visitors' voices with clarity and accuracy. 2. Multiple Volume Levels: Adjust the doorbell volume to your preference, meeting different environmental needs and ensuring you can easily hear the doorbell ring. 3. Long Standby Time: Equipped with a built in 1200mAh capacity battery, this wireless voice intercom doorbell has a long standby time. 4. Convenient to Install: With no need for complicated wiring, this wireless voice intercom doorbell offers easy installation and quickly enables the functionality of a doorbell. 5. Wide Application: Wireless voice intercom doorbell kit is suitable for home, apartment, school, villa, office, warehouse, hotel, factory, hospital, etc. Specification: Item Type: Wireless Voice Intercom Doorbell Material: ABS Size: Approx. 14 x 7 x 3cm/5.51 x 2.76 x 1.18in Battery Type: Polymer lithium battery Battery Model: 103040 Battery Capacity: 1200mAh (Built in). Package List: 1 x Outdoor Machine1 x Indoor Machine1 x Charging Cable2 x Adhesive Wall Tape1 x Manual