When charging for the case, the LED light will start to flash from 1 to 100. 2024 Upgraded Bluetooth 5.4 and One-Step Pairing: The I66 wireless earbuds adopts the advanced Bluetooth 5.4 technology and support A2DP, HFP, HSP, AVRCP, provides faster and more stable signal transmission and successfully achieves low latency without interruption.
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