1, computer Both desktop computers and computer motherboards have free PCI slots, so you can use the built-in sound card. Notebooks and desktop computers can use external sound cards and access through USB interface.

2. Sound card. The external sound card can effectively prevent electromagnetic interference, which the built-in sound card does not have, so its sound quality will be better.

3. camera. Call and communicate with video and sound through the camera on the network.

4. Microphone. Capacitor microphone and electret microphone are widely used at present. It should have stable performance, good sound quality and no noise interference.

5. Parentheses. The camera only monitors a certain position and does not rotate, so only the camera bracket can meet the requirements. Ordinary camera brackets are simple to install, low in price and various. There are four kinds of common supports: short, long, straight and curved, and different models are selected according to different requirements.