Rapoo Wireless Foldable Headset, Black (H3080) Reliable 24GHz wireless connection provides up to 10M working range You are free to enjoy high-quality, stereo audio For wire transmission, connect the audio line to the computer after the unit is powered off The speaker features COM-Ti membrane vibrating technology which delivers a clear and bright treble and a deep and mellow bass Fold-able headset design The hidden Omni-directional microphone automatically picks up your voice with remarkable clarity 2-hour charging,6-hour enjoyment Wireless Technology: 24Ghz RF Form Factor: Semi-open