HP DHS-2111S Wired Features: 360 ° surround sound Three-speaker design for high fidelity sound , restore live listening enjoy the immersive experience at any time Professional tuning calibration team just for the sound quality superb sound effect shocking low, medium and high tones Pure sound reduce the current noise interference! When the loudspeaker is turned on, this is the moment when beautiful music comes to your ears Independent knob control more convenient operation, volume control is more arbitrary The USB port is widely compatible with any choice of hardware Specification: Product model: HP DHS-2111S Rated voltage and current: DC-5V / 1A Rated power: 3W * 2 + 5W Impedance: 4Ω Frequency response: 150Hz-20KHz Sensitivity: 85dB ± 3dB Plug: USB interface + 3.5mm audio interface Weight: 810g Product size: host 128 (W) * 95 (H) * 105 (D) mm Auxiliary machine 64 (W) * 78 (H) * 55 (D) mm Cable Length: Exposed USB 1.2m The length of the left and right speaker cables is 0.9 m