Features 1、【Real-Time Two-Way Communication】: This wireless intercom doorbell offers real-time two-way communication, providing a secure and private conversation with anti-interference features. It/u0027s perfect for both home and office use, ensuring you never miss a visitor or important delivery. 2、【One-Button Operation】: With a simple one-button design, this doorbell makes it easy to call, answer, and end conversations. After 1 minute of conversation, the call will automatically end, making it convenient and efficient for quick interactions. 3、【Loud and Clear Alerts】: The doorbell features a flashing light and ringtone alert that lasts for 20 seconds, ensuring you/u0027re aware of any visitors. With a ringtone volume of 108 decibels, it/u0027s louder than a typical smartphone ringtone, so you won/u0027t miss any calls. 4、【Long-Lasting and Convenient Power】: The outdoor unit has a battery life of 6 months, assuming 5 presses a day and 1 minute of conversation per press. The indoor unit plugs into a 5V1A power adapter, ensuring it never runs out of power. The installation is easy, with the outdoor unit simply sticking to the wall with adhesive. 5、【High-Quality Design and Long Range】: The buttons are made of a plastic and silicone structure, with a high-gloss UV finish for a high-end look and feel. The intercom has a tested range of 100 meters, making it suitable for buildings with up to 4 floors. Plus, the indoor units can call and communicate with each other, adding an extra layer of convenience. Features: 【Real-Time Two-Way Communication】: This wireless intercom doorbell offers real-time two-way communication, providing a secure and private conversation with anti-interference features. It's perfect for both home and office use, ensuring you never miss a visitor or important delivery. 【One-Button Operation】: With a simple one-button design, this doorbell makes it easy to call, answer, and end conversations. After 1 minute of conversation, the call will automatically end, making it convenient and efficient for quick interactions. 【Loud and Clear Alerts】: The doorbell features a flashing light and ringtone alert that lasts for 20 seconds, ensuring you're aware of any visitors. With a ringtone volume of 108 decibels, it's louder than a typical smartphone ringtone, so you won't miss any calls. 【Long-Lasting and Convenient Power】: The outdoor unit has a battery life of 6 months, assuming 5 presses a day and 1 minute of conversation per press. The indoor unit plugs into a 5V1A power adapter, ensuring it never runs out of power. The installation is easy, with the outdoor unit simply sticking to the wall with adhesive. 【High-Quality Design and Long Range】: The buttons are made of a plastic and silicone structure, with a high-gloss UV finish for a high-end look and feel. The intercom has a tested range of 100 meters, making it suitable for buildings with up to 4 floors. Plus, the indoor units can call and communicate with each other, adding an extra layer of convenience. Specifications: Communication Method: Full duplex intercom Power Supply Method: A rechargeable lithium battery for the outdoor unit, and a 5V1A power adapter for the indoor unit Working Temperature: -20 ° C to 55 ° C Transmission Distance: About 100 meters in open space, 5-20 meters in partition walls, floors 1-4 Working Frequency: 433MHz Working Hours: The outdoor unit is recharged once, and the working time is about 6 months External Battery Capacity: 1000mAh Charging Time: Approximately 3 hours when the external unit is fully charged Music Ringtones: 5 ringtones Product Color: Black, White (optional) Product Size: 68 * 70 * 27mm/2.7 * 2.8 * 1.1inch Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Please allow slight manual measurement deviation for the data. Package List: 1 * Outdoor Machine 1 * Indoor Machine 1 * Instructions 1 * Screwdriver 1 * USB Data Cable Package List 1 * Outdoor Machine 1 * Indoor Machine 1 * Instructions 1 * Screwdriver 1 * USB Data Cable