1. We use the chip of the series of Jerry ac69xx, and the crystal Jerry in it is named ac69xx

2. This is a series. There are many kinds of chips under this series. The package is different, but the crystal element is the same

3. Kt1025a and kt1025b are programs developed based on their chips. In order to distinguish them, we specially renamed them

4. If you want to be certified, you have to be certified with Jerry's chip ac69xx, that's all

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1. Bluetooth authentication is a very troublesome thing, but don't worry, we will fully cooperate
2. A small number of customers can do it once. But most customers basically need to rectify once or twice
3. The direction of rectification is basically around the hardware, that is to change the resistance and capacitance around the Bluetooth antenna
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