★Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0, Bluetooth 5.0, Bluetooth 5.1, Bluetooth 5.3 and other specifications backward compatible. ★Adopts real 5.4 Bluetooth chip, complies with Bluetooth 5.3 technical specifications, LMP: 13.X, BLE/EDR dual mode low power transmission.
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