JIASU USB 2.0 SPEAKER MODEL: S186 Novel and lovely appearance and streamline design in the back side 2.0 channel stereo devise, sound accurately, freely enjoy your game excitement. USB 2.0 USB POWERED NOTEBOOK SPEAKER Specification: Power Supply: USB 5V Input: 3.5mm stereo audio cable Sensitivity: 550+_50mV Frequency Response: 90Hz-20KHz S/N: >=95dB TDH+N: