BT V4.1 + EDR provides a more stable and smooth connection. BT V4.1 + EDR provides a more stable and smooth connection. 4.0 type of CSR BT chip, Hi-Fi headset. BT Version: 4.1 + EDR, CSR. Voice prompt function, it will give sound like "Power on", "Pairing", "Connected", and make it easy to set and process the operation.
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