... : 100-18000HZ (+-3DB)Signal to noise ratio of 80dBLoudhailer cry: 1.55-inch (40MM outside) Steering, 4 ohmLINE IN interfaces: blending ... , connect your MP3, MP4, iPod, CD, PSP, mobile phone, laptop, USB drive, SD card, GPS.4, metal casing, more noble fashion, different, various ... glamour.6, the top mirror LED display, instantly displaying the MP3 player and FM FM radio frequencies.