Spider E-PTSK-BK03 Multifunction Bluetooth Speaker (Black) Music playing & hands free communication (mobile) via the Bluetooth Support Micro SD Card Music Playing, SD card memory up to 32G, MP3/WMA format Support Aux in, compatible with Music devices via 3.5mm audio cable, built in card reader, USB sound card and charging functions can be achieved via the same USB cable Fashion backlit touch button, better control experience, display the working status and support to display the time with easily operation Voice Prompt can help you know the current working mode