My fault for buying the I haven't read the specs but it doesn't have a 1/8 stereo jack, just Bluetooth. The 1/8 connector transmits a wider range of sounds. The human ear can hear 20-20Hz, this speaker claims to be able to reproduce 20-20Hz, but Bluetooth can only transmit 2400MHz - 2483MHz. So Sony claims that 400MHz is below the lower limit.
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