Sự miêu tả
YG-1 (original)
YG-1A (original)
YG-1B (original)
YG-1A (alternative)
YG-1B (alternative)
The original model is guaranteed for 1 year, and the replacement model is guaranteed for half a year. The original model is more sensitive and better quality than the replacement model, and it is recommended to use the original model.
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