1. DualWay IntercomThis intercom doorbell allows for realtime twoway communication. When someone presses the call button on the outdoor unit, the indoor chime immediately alerts you. You can answer and talk to the person outside without getting up. No network or cabling required, ready to use right out of the box. 2. Smart and SecureOur voice intercom doorbell features a smart intercom chip with strong penetration, allowing usage from the 1st to the 8th floor. The builtin highsensitivity microphone and speaker ensure smooth audio input and output. Safer and more convenient than ordinary doorbells. 3. 8 Months Standby TimeBoth the outdoor and indoor units are equipped with a rechargeable 2000mAh battery. The outdoor unit can work normally for approximately 8 months, with 5 calls per day and each call lasting 2 minutes. The indoor chime can operate for about a week. The doorbell indicator light and low battery voice prompt keep you informed of the status of your doorbell. 4. Wide ApplicationWith a detection distance of up to 1000m in unobstructed environments and 20 50 meters in obstructed environments, this electronic doorbell chime is a convenient choice for your home and office. It is also widely used in hotels, villas, factories, hospitals, and more. Enjoy the versatility and convenience wherever you are.