The Xiaomi Smart Camera C700 supports two-way voice calls between smartphones and the camera, making it a versatile communication tool. To initiate a call from the camera to a smartphone, simply make an "OK" gesture towards the camera. If the call is not answered, the system will automatically make a free call and send a voice alert, ensuring that important messages are conveyed. This feature employs active noise canceling technology, which effectively eliminates speaker echo and enhances the overall calling experience. With this seamless integration of communication capabilities, you can enjoy clear conversations and stay connected with your home environment effortlessly.