Brand: RAPOO - Model: H8030 - Wireless Type: 2.4GHz - Color: Black - Interface: USB - Transmission rate: 10m - Impedance: 2.2ohm - Sensitivity: 46dB - Headphone Frequency: 20Hz~20000Hz - Built-in 450mAh Li-ion battery - Charging time: 2 hours - Working time: 10 hours - Support Windows XP / Windows 7 / Vista / Mac OS X 10.4 or above - Recharges by using the universal mini USB cable-even white you are still playing 2 hours: 2-hour charging 10-hour enjoyment - Reliable 2.4GHz wireless connection provides up to 10m working range. You are free to enjoy high quality stereo audio - The speaker adopts COM-Ti membrane vibrating technology the treble is pure and bright the bas is mellow and thick - Rotatable noise-proof microphone provides you with clear phonetic communications by picking up your voice. Rotating the microphone down to the communication position you can make calls Rotating it up goes to the mute condition - Packing list: -1 x Wireless headphone - 1 x USB male to Micro USB male charging cable (94cm) - 1 x USB receiver - 1 x Chinese / English / Korean user manual