Product: H300 Color: Black Earphone Type:With wire Speaker: Yes Dive Unit: 40mm Jack Dimension: 3.5mm Output Resource: HiFi Wire Length: 1.2m Sensitiveness: 111dB+/-4; Frequency range: 8Hz-22000Hz Intelligent Noise Reduction: 20dB Passive Noise Canceling: 35Db Distortion Factor:94dB, 1KHz Impedance: 100 ohm (non-noise cancelling mode) 300 ohm (noise cancelling mode) Battery Installation Spin the cover on right ear counter clockwise to open it, and install 7A battery as symbol. Spin the cover clockwise to cover it with aid of 2 metal bump About 233621: Customized intelligent noise reduction products for Airlines... It is China's 1st professional intelligent noise reduction technology development and industrialization of the national high-tech enterprise, with more than 6 years of research and product of intelligent noise reduction technology experience achievements, is OEM, ODM manufacturers for large international companies, and has been providing products and services on intelligent noise reduction for Singapore Airlines, Qatar Airways, the United Arab Emirates Airlines, China Southern Airlines and Hainan Airlines and many other airlines. Global Top 3 Noise Canceling Technology Solutions Provider China's 1st focusing on intelligent noise reduction technology development, product design brand. One of 3 brands with Noise Canceling Patent in the world.
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