... ,DVD,iPod,iPhone,iPad,GPS,PSP,mobile phone,notebook computer, etc. Metallic, shell shown noble and fashionable, out of ordinary, with ... -1800HZ(±3dB)Signal and noise ratio of power amplifier: ≥80dBLoud speaker 1.77 inches (external diameter 45mm)Magnetic resistant 4OhmsPower supply ... flash indicator light. Ex: search blue tooth in the mobile, will present MUSIC ANGEL when have searched, choose MUSIC ...