QCC3031 APTXHD Module Audio Input LINE-in Lossless HiFi Bluetooth 5.15248
When using TWS for boxes: the highest protocol APTX. Clear TWS pairing information: the highest protocol APTXHD (3031 default). KCOM is the common end of the button, and the other end of the button is connected to VOL+, VOL-, N/V+, P/V-, PLAY.