... , TF card, FM, LED mobile phone speaker (2) mini phone speaker with li-ion battery, colorful and fashional ... mini mobile phone speaker Output(RMS): 3W*2 Frequency: 150HZ-20KHZ ... Impedance: 4Ω S/N: ≥85db Speaker Box Dimension(mm): L70*W45*H50 Power: DC ... TF, FM, LED display mobile phone speaker.USB mini phone speaker with li-ion battery, rechargeable and ...