All in one 2.1 channel soundbar with 3d surround sound. built in battery rechargeable li 1200 mah,Playing time: 8 hours (normal volume)</br>Bluetooth 4.1+EDR,Bluetooth remote control 10M (33 ft - no obstacles such as door , wall)</br>Support tf card, u disk, fm radio,AUX</br>Display led exposure time, wake up,function clock, line, fm radio, the state of charge, bluetooth and so on.</br>Support of hand when answer call (with microphone),support of the phone and the phone number and reporting function</br></br>Product Description</br></br><b>The Features of Bluetooth speaker:</b><br> .Bluetooth 4.1+EDR,the utmost receving distance is 10 meters.<br> .[Bluetooth calls]Voice clear without echo.<br> .[MP3 play]Directly play the MP3 files which stored in the TF card.<br> .[Flashdrive MP3 play]Directly play the MP3 files which stored in the Flashdrive.<br> .[Audio Input]Stereo audio input interface,easy to connect the audio equipments like computer,digital music player and mobile phone.<br> .[Breakpoint memory]Automatically memorize the last ending track and the volume.<br><br> .[Built-in battery]Built-in rechargable lithium battery,environmental protection,energy conservation and pratical.<br><br> <b>Specification:</b><br> .Built-in Battery voltage:3.7V:<br> .Battery Capacity:1200mAh<br> .Charging voltage:5V 500mAh<br> .Speaker driver:4Ω3W*2+BASS<br> .Frequency Response:60Hz to 18KHz<br> .S/N Ratio :75dB<br> .Distortion:0.5%<br><br><br> <b>Package Content:</b><br> - 1 x Bluetooth Speaker<br> - 1 x Micro USB Charging Cable<br> - 1 x 3.5mm AUX Audio Cable<br> - 1 x A User Manual<br></br><br/>http://www.amazon.com/gp/product/B01LXOHKLP