This j5 portable wireless speaker supports speakerphone, built-in microphone, to bring clear calls for you. also has a long lasting battery life. no complications too since it is simple and easy to use.the j5 stereo speaker has a massive, built-in, 6000mah li-ion rechargeable battery that provides more than 12 hours of playback time on a single charge. the battery is easily recharged from the speaker’s built-in usb port, which saves you battery hassles and money.bluetooth,calling,tf card,aux-in,usb portmaterial: abs plastic, rubber oil,fabric grill