Two-Way AudioThe doorbell camera has a built-in microphone and speaker system, which provides two-way high-fidelity conversation all the time. When someone presses the doorbell, APP will receive a notice. After clicking Open, it can have a video call with the visitors outside. No matter at home or outside, you will not miss any visitors. HD View Doorbell camera has built-in microphone and speaker. Door camera provides two-way talk and real-time video through noise reduction & rate adaptive technology, and allows you to have clear real-time communication with your visitors via your smartphone at anytime. 38 doorbell music included, you can change your favorite music at will. 2.4GHz Wi-Fi CompatibleThe 2.4GHz Wi-Fi range of Video Doorbell is up to 20m (66ft), it easily connects to your homes Wi-Fi network, sending live video feed to your phone. You can see and talk to the visitor from the comforts of your bed, from work, or while on vacation.Kindly RemindThis doorbell is temporarily not compatible with 5G Wi-Fi Intelligent and PortableThe doorbell can be controlled by APP, automatical work model, intelligent and portable.Portable in size and weight, convenient to install and remove. Night VisionAdvanced night vision, 850nm infrared fill light extend the viewing distance to 4ft in pitch dark with no light pollution. Day and night vision are automatically switched according to light changes. Wire-free design saves you from cable hassle, you can just mount it any spot you like. Take only a few minutes, then you can easily set the door camera up and mount it up at door. Use double-sided tape(attached to the back plate bracket) to directly stick to the wall/door.