SPECIFICATION

1 . Type:Waterproof Earphone

2. Cord:Specification .φ1.8[(8/0.08+250D)*3C]*1FPUL=1000±10mm 

3. Connection plug:φ3.5mm “I”Type stereo plug  with nikel-plated

CONFIDENCE TEST ：

1.   Waterproof Test There should be no external appearance and action at  water ：for 1.5 hours.

2. Low Temperature Test There should be no external appearance and actionat -10℃±2℃ for 2 hours.

3. High Temperature Test There should  be no external appearance and action at +55 ℃ ±2℃ for 2 hours.

4.  Humidity Test There should  be no external appearance and action at +40℃:and  relative  humidity  between 90%to95% for 48 hours .

5．Operating Temperature  :5℃ to 40℃(41°F to 104°F)

6.  Storage Temperature : -20℃ to 65℃ (-4°F to 149°F)

7.  Load  Test:There should  be meet the buzzes & rattles  test  and   distortion   Test after loading  2mW  of  white noise for 96                                                                                                                                                                             

8.  Phase polarity :When“+”voltage “-” is applied to the“R”or“L” of the  input  plug  and  “-” voltage is applige end. The diaphragm must move  forward.  

ELECTRICAL CHARACTERISTIC 

1. Driver Units : Ø10mm Mylar Speaker

2. Impedance :32ohm ±15% at 1kHz

3. Sensitivity  :106dB±3dB at 1kHz

4. Fredquency Range :  20HZ—20kHz

5. Channel Balance : Less  than  3dB  at  1KHz

6. Rated Power  : 2mW.

7. Maximum Power  : 4mW.

8. Distortion:Less than 6% (2mW at 1KHz).                     

9 . Buzzes & Rattles : Must be normal at 50Hz---2KHz.

10. Insulation Resistance:Input DC 100V  resistance over 2M ohms