Small and convenient dual noise reduction air conduction earphones for the eld
"1. USB rechargeable. Multi-colour can be selected.
2, 4 frequency mode switching.
3, Four gears volume adjustment.
4, imported chip, intelligent noise reduction.
5,Ear cap adopts medical TPE soft silicone, ear hook humanised arc design, comfortable to wear for a long time without pain.
6. Charge once can be used for 60 hours, lasting life.
7.Simple operation, not divided into left and right wear.
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Product Description
Maximum saturation sound pressure level: ≤129+3dB
Output SPL (HF average) : 120dB
Full-range sound gain (high-frequency average) : 38dB
Frequency Response Range: Not narrower than 500Hz ~ 3200Hz
Total harmonic distortion: the actual measured value should not exceed 8% max.
Equivalent input noise level: actual measured value should be ≤32dB
Rated power supply current consumption: should be ≤2mA".
Detailed Photos
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