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Hi everybody, This youtube channel shares experiences, tips in the field of audio and video from devices that I have used in my working time. I also make some videos about the technical problems of the devices from our customers. These are maybe old knowlegdes to you but new to someone else. This isn't a "Review" Channel. There are devices you can only see them in promotional videos, but you can see them in real life in my videos. In videos, I don't talk or make comments about any devices. I just want to show them to everyone. Users have their own personal opinions. I just want to suggest to the viewers, they can learn more by themselves on the internet. This is my channel's concept. Thanks for your understand ! In addition, I also have many videos in my working time, test videos, AV systems that I have participated in setting up and technical problems in the production of TV programs. If you like my channel, support me, please like, share and subscribe my channel ! Thanks!