... 4.Portable Professional new angel mini speaker box with fm radio Frequency response 150HZ-20KHZOutput(RMS) 3W*2SNR95dBTHD10(%) Impedance 4(Ω) ... card,compatible with mp3 format3.Built-in fm radio,you can enjoy the radio any time anywhere4.Used for network,computer,mp3 ... specializing in digital mini speaker,portable mini speaker,usb/fm radio/card reader speaker,mini speaker for mobile phone/computer/mp3 ...