Featuring compact size， elegant appearance and multifunction， this OVLENG S450 Head-mounted Multifunction Bluetooth Stereo Dynamic Headphone can bring much convenience and entertainment to you. It is suitable for desktop computer， PC， mobile phone， etc. Designed into fashionable appearance， it is both elegant and portable. Multifunction and meticulous craftsmanship make it attractive and popular. Besides， it is stable in performance and high-fidelity in tone quality. It will give you shocking and amazing high and low voice. Enjoy wonderful music world with this Bluetooth stereo dynamic headphone!                                    Features             Elegant and fashionable appearance， compact size <br> Excellent and pure tone quality， penetrating and shocking high and low voice<br> Support V2.1 + EDR Bluetooth wireless play and transmission <br> High-fidelity and stereo tone effect<br> With USB 2.0 interface for convenient use<br> Support MP3 and WMA music formats<br> Built-in rechargeable lithium battery<br> Support hand-free call function with built-in microphone<br> 3.5mm universal audio input jack is convenient and easy to use<br> Support memory card play <br>                                                            Specifications             Blutooth Version     V2.1 + EDR    <br> Working Distance Range     393.7" / 10m    <br> Frequency Range     2.4GHz - 2.4835GHz ISM Band    <br> Bluetooth Sensitivity     -85dB    <br>  PC Interface     USB 2.0    <br> Music Format     MP3/ WMA    <br> TF Card Support     128M - 32G    <br> FM Frequency Response     87.5Hz - 108MHz    <br> Rechargeable Lithium Battery     350mAh    <br> With Microphone     Yes    <br> Speaker Diameter     1.57" / 40mm    <br> Headphone Sensitivity     115dB S.P.L at 1KHz    <br> Impedance     32Ω    <br> Headphone Frequency Response     20Hz - 20KHz    <br> Rated Power     40mW    <br> Power Capability     100mW    <br> USB Cable Length     21.85" / 55.5cm    <br> Audio Cable Length     45.28" / 115cm    <br> Microphone Unit     4.5x2mm， -58dB±3dB    <br> Plug Type     3.5mm Stereo    <br> Weight     7.13oz / 202g    <br> Color     White    <br> Dimensions     (6.5 x 7.28 x 2.44)" / (16.5 x 18.5 x 6.2)cm (L x W x H)     <br>                                                             Package Includes            1 x Headphone<br>1 x Charging Line<br>1 x Instructions<br>1 x Audio Cable<br>1 x Plug<br>