<b>Product Feature</b>: <br> <br> 1.Switch <br> 2.LCD display <br>3.Push-button <br>4.USB charge interface <br>5.Audio interface<br><br> <b>FUNCTION:</b> <br><br>Built-in Digital Bluetooth & FM radio and MP 3 <br>Compatible,come with standard stereo jack cable for phone, MP 3 player, hands-free calling <br>Adjustable Padded Headband And Soft sealing cushion <br>3.7V rechargeable lithium battery <br> <br>Package Including: <br>1 X Bluetooth Earmuff <br>1 X User Manual