Hi Resolution Sound On-ear Multi-functional Headphones Brings More Joy and Convenience to Your Life. You get a pair of Bluetooth Headphones / Micro SD (TF) Card Mp3 Player by buying this headphones. Specicifications:Frequency Response:12-22000Hz Impedancia:32ohm Sensitivity:108dB/mW Operation Guide: Bluetooth: Press ON/OFF for about 3s to switch on. It begins bluetooth pairing mode when green light shines. Press On/Off for about 3s. If the Battery is low the red light twinckles fast.
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Granvela MS601 Hi Resolution Bluetooth Wireless MicroSDTF Card Mp3 Player FM Radio Headphones with 3.5mm AUX Cable-Black B07N4JLK91