Brand: RAPOO - Model: H3080 - Wireless Type: 2.4GHz - Color: White + grey - Interface: USB - Transmission Distance: 10m - Impedance: 2.2ohm - Sensitivity: 46dB - Headphone Frequency: 20~20000Hz - Built-in 350mAh Li-ion battery - Battery charging time: 2 hours - Working time: 10 hours - Sound Card: Yes - Operating system: Supports Windows XP / Windows 7 / Vista / Mac OS - Enjoys music wirelessly within a diameter of 10m. For wire transmission connect the audio line to the computer after the unit is powered off - The speaker adopts COM-Ti membrane vibrating technology the treble is pure and bright the bass is mellow and thick - Packing list: - 1 x Wireless headphone - 1 x USB receiver - 1 x 3.5mm plug to USB male audio cable (144cm) - 1 x Carrying pouch - 1 x USB charging cable (94cm) - 1 x Chinese / Korean / English user manual