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Features:
1). Innovative design for flexible and portable
2). Dynamic 40mm Hi-Fi driver deliver deep, dynamic bass.
3). In-line Mic, to skip music tracks and answer/hand-up calls Compatibility
4). Mic-switch to adapt the connection to all kinds of smarts phone in 3.5mmplug

Loading quantity:
1. CTN meas.: 74*56*56(cm)
2. Q'ty/ CTN: 100PCS
3. Total q'ty in 20'GP: 11, 000PCS.

Specifications:

Loudhailer diameter 40mm 
Frequency range 20~20.000Hz   
Sensitivity 113dB± 3dB at 1khz
Distortion ≤ 5%THD 
Mangnet size 15.5*2.2
Impedance   32Ω ± 15% 
Max Input power  50mW 
Mic Dimension 6.0*5.0mm
Sensitivity -48dB± 3dB
Cable Length  Approx 1.2M
Plug 3.4mm gold-plating