Rapoo 2.4Ghz USB Wireless Headset with Microphone (H8020 Black) Reliable 2.4GHz wireless connection provides up to 10M working range. You are free to enjoy high-quality, stereo audio The hidden omni-directional microphone automatically picks up your voice with remarkable clarity Recharge by using the universal mini-USB cable - even while your music is still playing 2-hour charging,8-hour enjoyment You can control volume up/down and music selection by just a single touch Wireless Technology: 2.4Ghz RF Host Interface: USB Form Factor: Semi-open