Changes after U1 upgrade:
1. Difference in photosensitive chips: The previous chips were relatively backward and rarely available on the market. The new chips have more advanced technology, are more low-light, clearer, have lower power consumption, and are more resistant to high temperatures
2. Microphone: The old model was an external analog microphone with poor effect, unsightly appearance, and space-consuming; the new model is a digital microphone with very good sound quality, more beautiful built-in, and does not take up space.
3. Anti-interference magnetic rings are added to the line
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