... phone and laptop 2.portable wireless speaker design, beautiful and practical. portable bluetooth mini speaker for MP3 mobile phone and laptop Product Name Card Reader Bluetooth stereo ... Transmission range<=10MFrequency Response20HZ-20KHZSignal-to-noise ratio80dbStatus IndicationRed, blue color indicatorApplicable matching productsMeet HFP, HSP, AD2P, AVRCP Bluetooth protocol computer, USB Bluetooth ...