JH-503-4

JH-503-4

 Mp3 earphone for helmet
1.The SPK can be stick inside the helmet.
2.With Volume adjust fuction.
3.High sound quality
4.connector with IPHONE, MP3 ,CD ect.

SPK:
Size:36mm
Audio pressure level:90dB+/-3dB
Impedance:32 Ω+/-15%
Audio output:20mW

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