This Dual USB Port Bluetooth V2.1 Hands-free Call Car MP3 Player allows you to enjoy effortless and affordable wireless connectivity from now on! Featured with stereo sound， it could provide you with high quality phone calls and beautiful music. Adopting highly advanced Bluetooth V2.1 technology， it supports hands-free calls. What is more， this car MP3 player supports music playing by USB flash drive. Peculiar design with dual USB port， it brings much convenience for you to charge or play with this device. Easy installation and great performance， it is really a worthwhile investment!                                    Features               <br> Mini size and light weight<br> Long standby， good sound quality， no noise<br> Bluetooth stereo headset provides excellent sound quality<br> Humanized dual USB port design， bringing much convenience<br> Unique technology supports dual phone connection at the same time<br> Support hands-free calls and music playing via USB flash drive<br> Built-in FM transmitter   <br>                                                            Specifications             Working Temperature     0-50℃    <br> Bluetooth Version     V2.1    <br> Frequency Response     20Hz-15KHz    <br> Transmission Distance     10M    <br> Voltage     12V-24V    <br> Play Format     MP3 / WPA     <br> USB Output     5V / 2.1A     <br> SNR     >60dB        <br> FM Frequency     87.5-108MHz    <br> Dimensions     (4.53 x 0.98 x 0.59)" /  (11.5 x 2.5 x 1.5)cm (L x W x H)    <br> Color     Black    <br> Weight     1.48oz / 42g    <br> Material     PC     <br>                                                             Package Includes            1 x Bluetooth Car Charger<br>1 x 3.5mm Audio Cable<br>1 x User Manual<br>