... Mini Speaker With Built-in Sound Card AUX in USB TF Card Reader MX-810 Detailed Product DescriptionPortable Mini Speaker with Built-in Sound Card ... by connnecting with mini USB jack, when power off.*TF card/ USB reader, maximum 64GB.*Clock, Alarm Clock function.*FM tuner ... , 87MHz~108MHz, internal antenna.*AUX-IN, 35mm, audio input for MP3, MP4 ...