MiNi Speakers: 1. Used for iPhone, iPad, GPS, PSP,Comuter and so on. 2. Different color can offer. MiNi Speakers 1. Size7.4*5.2*5cm , Aluminium alloy2. Frequency response87.5-108MHz3. Power input,550mAH Power Adapter 4. Output, RMS 6W(3W+3W) THD=10% 5. Frequency response150-18000Hz(±3dB)6. SNR≥80dB7. Loudspeaker,1.77 inch,outer diameter 45mm.