... :150HZ-- 20KHZ S / N :≥80db Output:3.7V/400MaPower:Li-battery Speaker:2W/4Ω ------------------------------------- -Creative hamburger design-Stereo bluetooth module-10 ... Ipod,MP3, computer etc-Build-in high capacity Li-ion battery-Works with Ipod, Iphone, Mobile, Computer etc. Mini bluetooth speaker ...