... :150-18000HZ (+ /-3dB)3) signal to noise ratio: ≥ 70 dB4)speaker: 45mm outer diameter, magnetically shielded 4 Europe5)LINE IN connector ... , FM radio function7)Power Input: 5V/1000mA original power adapter, USB 5V power supply and built-in lithium battery, can not ... , volume control, FM radio, songs, up and down song selection music angel usb mini speaker