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1*Receiving Sensitivity: -113DBU
2*Output Sensitivity: about 200mv
3*Signal to noise ratio: about 82dB
4*Distortion rate: about 0.7%
5*Frequency response: 60Hz-20KHz
6*Speakers: Bone conduction
8*Life time: About 5-7 hs
9*Waterproof level: IPX8
10*Ten meters deep water normal work
Note：Headset are divided into: Bluetooth WIth mp3 and individual MP3 Player, please pay attention to choose