Brand NEW! Advanced Wireless And Digital Technologies Provides Stereo Hi-Fidelity Without Wires PC With USB Audio Streaming Capability Through USB Port Microphone Function Via USB Devices With Audio Out Connectors Like TV, iPod, MP3, MP4, CD Player, Etc. Can Also Be Connected When Fully Charged, The Built-In Rechargeable Battery Can Support About 8 Hours Operation Time Mini USB Transmitter Active Noise Reduction Function Rechargeable Batteries Built-In To Headset USB To MINI-USB 5PIN Charging Cable Frequency Carrier: 2.4ghz Reception Range: 10m 360 Transmit Power: 4dbm Frequency Range: 2.4G ~ 2.48ghz Frequency Response: 20- 20000Hz S/N Ratio: 80db Distortion: 0.1% Working Power: 3.5-4.2V Speaker Size: 30mm Headset Size: 2.16'' x 5.12'' x 5.71'' Headset Weight: 8 Oz. Sold as: Unit Weight: 0.61 lbs. - All international buyers are responsible for all tax, duties and/or customs fees.